V. SLUGS AND SNAILS.

Hoeing among the flower-beds on my lawn this morning—for I am a bit of a gardener in my way—I have had the ill-luck to maim¹ a poor yellow slug, who had hidden himself among the encroaching grass on the edge of my little parterre of sky-blue lobelias. This unavoidable wounding and hacking² of worms and insects, despite all one's care, is no small drawback to the pleasures of gardening in propria persona. Vivisection for genuine scientific purposes in responsible hands, one can understand and tolerate, even though lacking the heart for it oneself; but the useless and causeless vivisection which cannot be prevented in every ordinary piece of farm-work seems a gratuitous³ blot⁴ upon the face of beneficent nature. My only consolation⁵ lies in the half-formed belief that feeling among these lower creatures is indefinite, and that pain appears to affect them far less acutely than it affects warm-blooded animals. Their nerves are so rudely distributed in loose knots all over the body, instead of being closely bound together into a single central system as with ourselves, that they can scarcely possess a consciousness of pain at all analogous⁶ to our own. A wasp⁷ whose head has been severed⁸ from its body and stuck upon a pin, will still greedily suck up honey with its throatless mouth; while an Italian mantis⁹, similarly treated, will calmly continue to hunt and dart¹⁰ at midges with its decapitated trunk and limbs, quite forgetful of the fact that it has got no mandibles left to eat them with. These peculiarities¹¹ lead one to hope that insects may feel pain less than we fear. Yet I dare scarcely utter the hope, lest it should lead any thoughtless hearer to act upon the very questionable¹² belief, as they say even the amiable¹³ enthusiasts¹⁴ of Port Royal acted upon the doctrine¹⁵ that animals were mere¹⁶ unconscious automata, by pushing their theory to the too practical length of active cruelty. Let us at least give the slugs and beetles¹⁷ the benefit of the doubt. People often say that science makes men unfeeling: for my own part, I fancy it makes them only the more humane¹⁸, since they are the better able dimly to figure to themselves the pleasures and pains of humbler beings as they really are. The man of science perhaps realises more vividly¹⁹ than all other men the inner life and vague rights even of crawling worms and ugly earwigs.

I will take up this poor slug whose mishap²⁰ has set me preaching, and put him out of his misery²¹ at once, if misery it be. My hoe has cut through the soft flesh of the mantle²² and hit against the little embedded²³ shell. Very few people know that a slug has a shell, but it has, though quite hidden from view; at least, in this yellow kind—for there are other sorts which have got rid of it altogether. I am not sure that I have wounded the poor thing very seriously; for the shell protects the heart and vital organs, and the hoe has glanced off on striking it, so that the mantle alone is injured, and that by no means irrecoverably. Snail²⁴ flesh heals fast, and on the whole I shall be justified²⁵, I think, in letting him go. But it is a very curious thing that this slug should have a shell at all! Of course it is by descent a snail, and, indeed, there are very few differences between the two races except in the presence or absence of a house. You may trace a curiously²⁶ complete set of gradations between the perfect snail and the perfect slug in this respect; for all the intermediate forms still survive with only an almost imperceptible gap between each species and the next. Some kinds, like the common brown garden snail, have comparatively small bodies and big shells, so that they can retire comfortably within them when attacked; and if they only had a lid or door to their houses they could shut themselves up hermetically, as periwinkles and similar mollusks actually do. Other kinds, like the pretty golden amber-snails²⁷ which frequent marshy²⁸ places, have a body much too big for its house, so that they cannot possibly retire within their shells completely. Then come a number of intermediate species, each with progressively smaller and thinner shells, till at length we reach the testacella, which has only a sort of limpet-shaped shield on his tail, so that he is generally recognised as being the first of the slugs rather than the last of the snails. You will not find a testacella unless you particularly look for him, for he seldom comes above ground, being a most bloodthirsty subterraneous carnivore who follows the burrows²⁹ of earthworms as savagely³⁰ as a ferret tracks those of rabbits; but in all the southern and western counties you may light upon stray specimens³¹ if you search carefully in damp places under fallen leaves. Even in testacella, however, the small shell is still external. In this yellow slug here, on the contrary, it does not show itself at all, but is buried under the closely wrinkled skin of the glossy³² mantle. It has become a mere saucer, with no more symmetry or regularity³³ than an oyster-shell. Among the various kinds of slugs, you may watch this relic³⁴ or rudiment³⁵ gradually dwindling³⁶ further and further towards annihilation; till finally, in the great fat black slugs which appear so plentifully³⁷ on the roads after summer showers, it is represented only by a few rough calcareous grains, scattered³⁸ up and down through the mantle; and sometimes even these are wanting. The organs which used to secrete³⁹ the shell in their remote ancestors have either ceased to work altogether or are reduced to performing a useless office by mere organic routine.

The reason why some mollusks have thus lost their shells is clear enough. Shells are of two kinds, calcareous and horny. Both of them require more or less lime or other mineral matters, though in varying proportions. Now, the snails which thrive best on the bare chalk downs behind my little combe belong to that pretty banded black-and-white sort which everybody must have noticed feeding in abundance on all chalk soils. Indeed, Sussex farmers will tell you that South Down mutton owes its excellence⁴⁰ to these fat little mollusks, not to the scanty⁴¹ herbage of their thin pasture-lands. The pretty banded shells in question are almost wholly composed of lime, which the snails can, of course, obtain in any required quantity from the chalk. In most limestone⁴² districts you will similarly find that snails with calcareous shells predominate. But if you go into a granite⁴³ or sandstone tract⁴⁴ you will see that horny shells have it all their own way. Now, some snails with such houses took to living in very damp and marshy places, which they were naturally apt to do—as indeed the land-snails in a body are merely pond-snails which have taken to crawling up the leaves of marsh-plants, and have thus gradually acclimatised themselves to a terrestrial existence. We can trace a perfectly⁴⁵ regular series from the most aquatic⁴⁶ to the most land-loving species, just as I have tried to trace a regular series from the shell-bearing snails to the shell-less slugs. Well, when the earliest common ancestor of both these last-named races first took to living above water, he possessed⁴⁷ a horny shell (like that of the amber-snail), which his progenitors⁴⁸ used to manufacture from the mineral matters dissolved in their native streams. Some of the younger branches descended⁴⁹ from this prim⁵⁰?val land-snail took to living on very dry land, and when they reached chalky districts manufactured their shells, on an easy and improved principle, almost entirely⁵¹ out of lime. But others took to living in moist and boggy⁵² places, where mineral matter was rare, and where the soil consisted for the most part of decaying vegetable mould. Here they could get little or no lime, and so their shells grew smaller and smaller, in proportion as their habits became more decidedly terrestrial. But to the last, as long as any shell at all remained, it generally covered their hearts and other important organs; because it would there act as a special protection, even after it had ceased to be of any use for the defence of the animal's body as a whole. Exactly in the same way men specially⁵³ protected their heads and breasts with helmets and cuirasses, before armour⁵⁴ was used for the whole body, because these were the places where a wound would be most dangerous; and they continued to cover these vulnerable spots in the same manner even when the use of armour had been generally abandoned. My poor mutilated slug, who is just now crawling off contentedly⁵⁵ enough towards the hedge, would have been cut in two outright⁵⁶ by my hoe had it not been for that solid calcareous plate of his, which saved his life as surely as any coat of mail.

How does it come, though, that slugs and snails now live together in the self-same districts? Why, because they each live in their own way. Slugs belong by origin to very damp and marshy spots; but in the fierce competition of modern life they spread themselves over comparatively dry places, provided there is long grass to hide in, or stones under which to creep, or juicy herbs like lettuce⁵⁷, among whose leaves are nice moist nooks wherein to lurk⁵⁸ during the heat of the day. Moreover, some kinds of slugs are quite as well protected from birds (such as ducks) by their nauseous taste as snails are by their shells. Thus it happens that at present both races may be discovered in many hedges and thickets⁵⁹ side by side. But the real home of each is quite different. The truest and most snail-like snails are found in greatest abundance upon high chalk-downs, heathy limestone hills, and other comparatively dry places; while the truest and most slug-like slugs are found in greatest abundance among low water-logged meadows, or under the damp fallen leaves of moist copses. The intermediate kinds inhabit the intermediate places. Yet to the last even the most thorough-going snails retain a final trace of their original water-haunting life, in their universal habit of seeking out the coolest and moistest spots of their respective habitats. The soft-fleshed mollusks are all by nature aquatic animals, and nothing can induce them wholly to forget the old tradition of their marine⁶⁰ or fresh-water existence.

1 maim   

v.使残废，使不能工作，使伤残

参考例句：

• Automobile accidents maim many people each year. 汽车车祸每年使许多人残废。
• These people kill and maim innocent civilians.这些人杀死和残害无辜平民。

2 hacking   

n.非法访问计算机系统和数据库的活动

参考例句：

• The patient with emphysema is hacking all day. 这个肺气肿病人整天不断地干咳。
• We undertook the task of hacking our way through the jungle. 我们负责在丛林中开路。

3 gratuitous   

adj.无偿的，免费的；无缘无故的，不必要的

参考例句：

• His criticism is quite gratuitous.他的批评完全没有根据。
• There's too much crime and gratuitous violence on TV.电视里充斥着犯罪和无端的暴力。

4 blot   

vt.弄脏（用吸墨纸）吸干；n.污点，污渍

参考例句：

• That new factory is a blot on the landscape.那新建的工厂破坏了此地的景色。
• The crime he committed is a blot on his record.他犯的罪是他的履历中的一个污点。

5 consolation   

n.安慰，慰问

参考例句：

• The children were a great consolation to me at that time.那时孩子们成了我的莫大安慰。
• This news was of little consolation to us.这个消息对我们来说没有什么安慰。

6 analogous   

adj.相似的；类似的

参考例句：

• The two situations are roughly analogous.两种情況大致相似。
• The company is in a position closely analogous to that of its main rival.该公司与主要竞争对手的处境极为相似。

7 wasp   

n.黄蜂，蚂蜂

参考例句：

• A wasp stung me on the arm.黄蜂蜇了我的手臂。
• Through the glass we can see the wasp.透过玻璃我们可以看到黄蜂。

8 severed   

v.切断，断绝( sever的过去式和过去分词 )；断，裂

参考例句：

• The doctor said I'd severed a vessel in my leg. 医生说我割断了腿上的一根血管。 来自《简明英汉词典》
• We have severed diplomatic relations with that country. 我们与那个国家断绝了外交关系。 来自《简明英汉词典》

9 mantis   

n.螳螂

参考例句：

• Praying mantis has two powerful claws like sharp knives.螳螂有一对强壮的爪子，它们像锋利的刀。
• In her mind,it was a female mantis,devouring her mates.她的意识中，是一只雌螳螂正吞咽她的配偶。

10 dart   

v.猛冲，投掷；n.飞镖，猛冲

参考例句：

• The child made a sudden dart across the road.那小孩突然冲过马路。
• Markov died after being struck by a poison dart.马尔科夫身中毒镖而亡。

11 peculiarities   

n. 特质, 特性, 怪癖, 古怪

参考例句：

• the cultural peculiarities of the English 英国人的文化特点
• He used to mimic speech peculiarities of another. 他过去总是模仿别人讲话的特点。

12 questionable   

adj.可疑的，有问题的

参考例句：

• There are still a few questionable points in the case.这个案件还有几个疑点。
• Your argument is based on a set of questionable assumptions.你的论证建立在一套有问题的假设上。

13 amiable   

adj.和蔼可亲的，友善的，亲切的

参考例句：

• She was a very kind and amiable old woman.她是个善良和气的老太太。
• We have a very amiable companionship.我们之间存在一种友好的关系。

14 enthusiasts   

n.热心人，热衷者( enthusiast的名词复数 )

参考例句：

• A group of enthusiasts have undertaken the reconstruction of a steam locomotive. 一群火车迷已担负起重造蒸汽机车的任务。 来自《简明英汉词典》
• Now a group of enthusiasts are going to have the plane restored. 一群热心人计划修复这架飞机。 来自新概念英语第二册

15 doctrine   

n.教义；主义；学说

参考例句：

• He was impelled to proclaim his doctrine.他不得不宣扬他的教义。
• The council met to consider changes to doctrine.宗教议会开会考虑更改教义。

16 mere   

adj.纯粹的；仅仅，只不过

参考例句：

• That is a mere repetition of what you said before.那不过是重复了你以前讲的话。
• It's a mere waste of time waiting any longer.再等下去纯粹是浪费时间。

17 beetles   

n.甲虫( beetle的名词复数 )

参考例句：

• Beetles bury pellets of dung and lay their eggs within them. 甲壳虫把粪粒埋起来，然后在里面产卵。 来自《简明英汉词典》
• This kind of beetles have hard shell. 这类甲虫有坚硬的外壳。 来自《现代汉英综合大词典》

18 humane   

adj.人道的，富有同情心的

参考例句：

• Is it humane to kill animals for food?宰杀牲畜来吃合乎人道吗？
• Their aim is for a more just and humane society.他们的目标是建立一个更加公正、博爱的社会。

19 vividly   

adv.清楚地，鲜明地，生动地

参考例句：

• The speaker pictured the suffering of the poor vividly.演讲者很生动地描述了穷人的生活。
• The characters in the book are vividly presented.这本书里的人物写得栩栩如生。

20 mishap   

n.不幸的事，不幸；灾祸

参考例句：

• I'm afraid your son had a slight mishap in the playground.不好了，你儿子在操场上出了点小意外。
• We reached home without mishap.我们平安地回到了家。

21 misery   

n.痛苦，苦恼，苦难；悲惨的境遇，贫苦

参考例句：

• Business depression usually causes misery among the working class.商业不景气常使工薪阶层受苦。
• He has rescued me from the mire of misery.他把我从苦海里救了出来。

22 mantle   

n.斗篷，覆罩之物，罩子；v.罩住，覆盖，脸红

参考例句：

• The earth had donned her mantle of brightest green.大地披上了苍翠欲滴的绿色斗篷。
• The mountain was covered with a mantle of snow.山上覆盖着一层雪。

23 embedded   

a.扎牢的

参考例句：

• an operation to remove glass that was embedded in his leg 取出扎入他腿部玻璃的手术
• He has embedded his name in the minds of millions of people. 他的名字铭刻在数百万人民心中。

24 snail   

n.蜗牛

参考例句：

• Snail is a small plant-eating creature with a soft body.蜗牛是一种软体草食动物。
• Time moved at a snail's pace before the holidays.放假前的时间过得很慢。

25 justified   

a.正当的，有理的

参考例句：

• She felt fully justified in asking for her money back. 她认为有充分的理由要求退款。
• The prisoner has certainly justified his claims by his actions. 那个囚犯确实已用自己的行动表明他的要求是正当的。

26 curiously   

adv.有求知欲地；好问地；奇特地

参考例句：

• He looked curiously at the people.他好奇地看着那些人。
• He took long stealthy strides. His hands were curiously cold.他迈着悄没声息的大步。他的双手出奇地冷。

27 snails   

n.蜗牛；迟钝的人；蜗牛( snail的名词复数 )

参考例句：

• I think I'll try the snails for lunch—I'm feeling adventurous today. 我想我午餐要尝一下蜗牛——我今天很想冒险。 来自《简明英汉词典》
• Most snails have shells on their backs. 大多数蜗牛背上有壳。 来自《简明英汉词典》

28 marshy   

adj.沼泽的

参考例句：

• In August 1935,we began our march across the marshy grassland. 1935年8月，我们开始过草地。
• The surrounding land is low and marshy. 周围的地低洼而多沼泽。

29 burrows   

n.地洞( burrow的名词复数 )v.挖掘（洞穴），挖洞( burrow的第三人称单数 )；翻寻

参考例句：

• The intertidal beach unit contains some organism burrows. 潮间海滩单元含有一些生物潜穴。 来自辞典例句
• A mole burrows its way through the ground. 鼹鼠会在地下钻洞前进。 来自辞典例句

30 savagely   

adv. 野蛮地，残酷地

参考例句：

• The roses had been pruned back savagely. 玫瑰被狠狠地修剪了一番。
• He snarled savagely at her. 他向她狂吼起来。

31 specimens   

n.样品( specimen的名词复数 )；范例；（化验的）抽样；某种类型的人

参考例句：

• Astronauts have brought back specimens of rock from the moon. 宇航员从月球带回了岩石标本。
• The traveler brought back some specimens of the rocks from the mountains. 那位旅行者从山上带回了一些岩石标本。 来自《简明英汉词典》

32 glossy   

adj.平滑的；有光泽的

参考例句：

• I like these glossy spots.我喜欢这些闪闪发光的花点。
• She had glossy black hair.她长着乌黑发亮的头发。

33 regularity   

n.规律性，规则性；匀称，整齐

参考例句：

• The idea is to maintain the regularity of the heartbeat.问题就是要维持心跳的规律性。
• He exercised with a regularity that amazed us.他锻炼的规律程度令我们非常惊讶。

34 relic   

n.神圣的遗物，遗迹，纪念物

参考例句：

• This stone axe is a relic of ancient times.这石斧是古代的遗物。
• He found himself thinking of the man as a relic from the past.他把这个男人看成是过去时代的人物。

35 rudiment   

n.初步；初级；基本原理

参考例句：

• The rudiment with the capitalism,new developing citizens stratum appeared in the society in the ming dynasty.伴随着资本主义的萌芽，明代社会出现了新兴的市民阶层。
• It do not take me long to pick up the rudiment of the language.我没有费多少时间就学会了这一语言的初步知识。

36 dwindling   

adj.逐渐减少的v.逐渐变少或变小( dwindle的现在分词 )

参考例句：

• The number of wild animals on the earth is dwindling. 地球上野生动物的数量正日渐减少。 来自《简明英汉词典》
• He is struggling to come to terms with his dwindling authority. 他正努力适应自己权力被削弱这一局面。 来自辞典例句

37 plentifully   

adv. 许多地，丰饶地

参考例句：

• The visitors were plentifully supplied with food and drink. 给来宾准备了丰富的食物和饮料。
• The oil flowed plentifully at first, but soon ran out. 起初石油大量涌出，但很快就枯竭了。

38 scattered   

adj.分散的，稀疏的；散步的；疏疏落落的

参考例句：

• Gathering up his scattered papers,he pushed them into his case.他把散乱的文件收拾起来，塞进文件夹里。

39 secrete   

vt.分泌；隐匿，使隐秘

参考例句：

• The pores of your body secrete sweat.身上的毛孔分泌汗液。
• Squirrels secrete a supply of nuts for winter.松鼠为准备过冬而藏坚果。

40 excellence   

n.优秀，杰出，(pl.)优点，美德

参考例句：

• His art has reached a high degree of excellence.他的艺术已达到炉火纯青的地步。
• My performance is far below excellence.我的表演离优秀还差得远呢。

41 scanty   

adj.缺乏的，仅有的，节省的，狭小的，不够的

参考例句：

• There is scanty evidence to support their accusations.他们的指控证据不足。
• The rainfall was rather scanty this month.这个月的雨量不足。

42 limestone   

n.石灰石

参考例句：

• Limestone is often used in building construction.石灰岩常用于建筑。
• Cement is made from limestone.水泥是由石灰石制成的。

43 granite   

adj.花岗岩，花岗石

参考例句：

• They squared a block of granite.他们把一块花岗岩加工成四方形。
• The granite overlies the older rocks.花岗岩躺在磨损的岩石上面。

44 tract   

n.传单，小册子，大片(土地或森林)

参考例句：

• He owns a large tract of forest.他拥有一大片森林。
• He wrote a tract on this subject.他曾对此写了一篇短文。

45 perfectly   

adv.完美地，无可非议地，彻底地

参考例句：

• The witnesses were each perfectly certain of what they said.证人们个个对自己所说的话十分肯定。
• Everything that we're doing is all perfectly above board.我们做的每件事情都是光明正大的。

46 aquatic   

adj.水生的，水栖的

参考例句：

• Aquatic sports include swimming and rowing.水上运动包括游泳和划船。
• We visited an aquatic city in Italy.我们在意大利访问过一个水上城市。

47 possessed   

adj.疯狂的；拥有的，占有的

参考例句：

• He flew out of the room like a man possessed.他像着了魔似地猛然冲出房门。
• He behaved like someone possessed.他行为举止像是魔怔了。

48 progenitors   

n.祖先( progenitor的名词复数 )；先驱；前辈；原本

参考例句：

• The researchers also showed that the progenitors mature into neurons in Petri dishes. 研究人员还表示，在佩特里培养皿中的脑细胞前体可以发育成神经元。 来自英汉非文学 - 生命科学 - 大脑与疾病
• Though I am poor and wretched now, my progenitors were famously wealthy. 别看我现在穷困潦倒，我家上世可是有名的富翁。 来自互联网

49 descended   

a.为...后裔的，出身于...的

参考例句：

• A mood of melancholy descended on us. 一种悲伤的情绪袭上我们的心头。
• The path descended the hill in a series of zigzags. 小路呈连续的之字形顺着山坡蜿蜒而下。

50 prim   

adj.拘泥形式的，一本正经的；n.循规蹈矩，整洁；adv.循规蹈矩地，整洁地

参考例句：

• She's too prim to enjoy rude jokes!她太古板，不喜欢听粗野的笑话！
• He is prim and precise in manner.他的态度一本正经而严谨

51 entirely   

ad.全部地，完整地；完全地，彻底地

参考例句：

• The fire was entirely caused by their neglect of duty. 那场火灾完全是由于他们失职而引起的。
• His life was entirely given up to the educational work. 他的一生统统献给了教育工作。

52 boggy   

adj.沼泽多的

参考例句：

• Of, resembling, or characterized by a marsh or marshes; boggy. 沼泽般的，湿软的：类似沼泽地的，沼泽地所特有的；多沼泽的。 来自互联网
• The boggy is out of order, would be instead another one! 球车坏了，需要更换一部。 来自互联网

53 specially   

adv.特定地；特殊地；明确地

参考例句：

• They are specially packaged so that they stack easily.它们经过特别包装以便于堆放。
• The machine was designed specially for demolishing old buildings.这种机器是专为拆毁旧楼房而设计的。

54 armour   

（=armor）n.盔甲；装甲部队

参考例句：

• His body was encased in shining armour.他全身披着明晃晃的甲胄。
• Bulletproof cars sheathed in armour.防弹车护有装甲。

55 contentedly   

adv.心满意足地

参考例句：

• My father sat puffing contentedly on his pipe.父亲坐着心满意足地抽着烟斗。
• "This is brother John's writing,"said Sally,contentedly,as she opened the letter.

56 outright   

adv.坦率地；彻底地；立即；adj.无疑的；彻底的

参考例句：

• If you have a complaint you should tell me outright.如果你有不满意的事，你应该直率地对我说。
• You should persuade her to marry you outright.你应该彻底劝服她嫁给你。

57 lettuce   

n.莴苣；生菜

参考例句：

• Get some lettuce and tomatoes so I can make a salad.买些莴苣和西红柿，我好做色拉。
• The lettuce is crisp and cold.莴苣松脆爽口。

58 lurk   

n.潜伏，潜行；v.潜藏，潜伏，埋伏

参考例句：

• Dangers lurk in the path of wilderness.在这条荒野的小路上隐伏着危险。
• He thought he saw someone lurking above the chamber during the address.他觉得自己看见有人在演讲时潜藏在会议厅顶上。

59 thickets   

n.灌木丛( thicket的名词复数 )；丛状物

参考例句：

• Small trees became thinly scattered among less dense thickets. 小树稀稀朗朗地立在树林里。 来自辞典例句
• The entire surface is covered with dense thickets. 所有的地面盖满了密密层层的灌木丛。 来自辞典例句

60 marine   

adj.海的；海生的；航海的；海事的；n.水兵

参考例句：

• Marine creatures are those which live in the sea. 海洋生物是生存在海里的生物。
• When the war broke out,he volunteered for the Marine Corps.战争爆发时，他自愿参加了海军陆战队。