登陆注册
5200300000006

第6章

It is clear then how locomotion belongs to those animals only which make their changes of place by means of two or four points in their structure, or to such animals par excellence.Moreover, since this property belongs almost peculiarly to Sanguineous animals, we see that no Sanguineous animal can progress at more points than four, and that if it is the nature of anything so to progress at four points it must of necessity be Sanguineous.

What we observe in the animal world is in agreement with the above account.For no Sanguineous animal if it be divided into more parts can live for any appreciable length of time, nor can it enjoy the power of locomotion which it possessed while it was a continuous and undivided whole.But some bloodless animals and polypods can live a long time, if divided, in each of the severed parts, and can move in the same way as before they were dismembered.Examples are what is termed the centipede and other insects that are long in shape, for even the hinder portion of all these goes on progressing in the same direction as before when they are cut in two.

The explanation of their living when thus divided is that each of them is constructed like a continuous body of many separate living beings.It is plain, too, from what was said above why they are like this.Animals constructed most naturally are made to move at two or four points, and even limbless Sanguinea are no exception.They too move by dint of four points, whereby they achieve progression.They go forward by means of two flexions.For in each of their flexions there is a right and a left, both before and behind in their flat surface, in the part towards the head a right and a left front point, and in the part towards the tail the two hinder points.They look as if they moved at two points only, where they touch before and behind, but that is only because they are narrow in breadth.Even.

in them the right is the sovereign part, and there is an alternate correspondence behind, exactly as in quadrupeds.The reason of their flexions is their great length, for just as tall men walk with their spines bellied (undulated) forward, and when their right shoulder is leading in a forward direction their left hip rather inclined backwards, so that their middle becomes hollow and bellied (undulated), so we ought to conceive snakes as moving in concave curves (undulations) upon the ground.And this is evidence that they move themselves like the quadrupeds, for they make the concave in its turn convex and the convex concave.When in its turn the left of the forward parts is leading, the concavity is in its turn reversed, for the right becomes the inner.(Let the right front point be A, the left B, the right hind C, the left D.)Among land animals this is the character of the movement of snakes, and among water animals of eels, and conger-eels and also lampreys, in fact of all that have their form snakelike.However, some marine animals of this shape have no fin, lampreys for example, but put the sea to the same use as snakes do both land and water (for snakes swim precisely as they move on the ground).Others have two fins only, for example conger-eels and eels and a kind of cestreus which breeds in the lake of Siphae.On this account too those that are accustomed to live on land, for example all the eels, move with fewer flexions in a fluid than on land, while the kind of cestreus which has two fins, by its flexion in a fluid makes up the remaining points.

同类推荐
  • 伤寒论宋版

    伤寒论宋版

    本书为公版书,为不受著作权法限制的作家、艺术家及其它人士发布的作品,供广大读者阅读交流。汇聚授权电子版权。
  • 弁山小隐吟录

    弁山小隐吟录

    本书为公版书,为不受著作权法限制的作家、艺术家及其它人士发布的作品,供广大读者阅读交流。汇聚授权电子版权。
  • 老子解略

    老子解略

    本书为公版书,为不受著作权法限制的作家、艺术家及其它人士发布的作品,供广大读者阅读交流。汇聚授权电子版权。
  • 高坡异纂

    高坡异纂

    本书为公版书,为不受著作权法限制的作家、艺术家及其它人士发布的作品,供广大读者阅读交流。汇聚授权电子版权。
  • John Halifax

    John Halifax

    本书为公版书,为不受著作权法限制的作家、艺术家及其它人士发布的作品,供广大读者阅读交流。汇聚授权电子版权。
热门推荐
  • 我被大佬宠成了玛丽苏女主

    我被大佬宠成了玛丽苏女主

    萧家二小姐十八岁以前,跟“真爱”腻歪的死去活来;十八岁以后,“真爱”抱着她的“姐姐”,腻歪的死去活来。她痛快转身飞法国潇洒了五年。五年后,她回来虐天虐地虐渣渣,结果一不小心被某大佬宠成了玛丽苏女主。片段:萧小姐被车撞了住进了医院,大佬亲力亲为照顾。手术后第一天,滴水不能沾,萧小姐渴的不行,眼巴巴的小眼神看的大佬心疼的不行。“乖,再忍一忍,忍过这一天,我做好吃的好喝的给你好不好?”一听要忍一天,萧小姐小嘴一瘪,就要哭出来了。大佬心疼的抱住她小身子,非常温柔的哄着:“乖乖,只要忍过这一天就好了。今天我陪着你一起,什么也不吃什么也不喝,一起饿肚子好不好?”萧小姐被逗笑。【这本书甜的不行!宠的不行!!好看的不行!!!快来看呀~~~~~~~】
  • 双鲤迢迢一纸书

    双鲤迢迢一纸书

    那年,她十四岁,他九岁,她成了他的小夫子。他百般刁难、千般恶语,恨不得小夫子知难而退。偏偏,越是相处,越是心惊,不知不觉喜欢上不该喜欢的你……十六岁那年,他冲破世俗的伦理,痛痛快快地将小夫子吃干抹净。“夫子,这世上惟你知我,可为何你却如此无情?”女师男徒,超脱世俗,演绎一场惊心动魄的旷世绝恋……
  • 道人的徒弟

    道人的徒弟

    骑牛走遍天下,脚穿草鞋的道人,此生收了几个不成器的徒弟。而这篇故事讲述的就是他收的最后一个徒弟的人生。财神沦为酒馆的小二,东华帝君帮忙打天下,拥有咸鱼的心,却不得不走上傲世独尊之路的小人物。
  • 寂静玛尼歌

    寂静玛尼歌

    浪子啊,你虽已死,但你能否说出,在你短暂的一生中,有多少次远足值得铭记?因为有着在戈麦高地上与康巴藏人一同游牧四野的传奇经历,作为一个汉人,柴春芽才敢于书写他对中国西部牧野生活的缅怀。因为漫游了西藏大地并最终皈依了藏传佛教,柴春芽才勇于坦露心迹,探索灵魂的深度与载力。
  • 凯歌百代美名扬

    凯歌百代美名扬

    上个世纪的1952年10月14日至11月25日。我所在的中国人民志愿军第15军在举世闻名的朝鲜战场五圣山战区上甘岭。由我所在的45师135团两个连队扼守仅3.7平方公里、正面宽仅2.5公里的弹丸之地(即597,9高地和537,7高地北山两个山包),与以世界军界一致公认的世界最大的军事强国美国军队为主的所谓“联合国军”,展开了敌方称之为“金化攻势”、我军则称之为上甘岭战役的一场鏖战。在这场历时43天的鏖战中,敌人先后共投入兵力6万余人,参战火炮1565门,坦克120辆,飞机3000余架次。
  • 若不相欠,怎会遇见

    若不相欠,怎会遇见

    在诺查丹玛斯预言说世界末日这天,女主的生活迎来了“末日”。这一天,做了五年的杂志宣布停刊,发现处了两年的男友电话里,那个经常嘘寒问暖的男同事的手机号,竟是大学时候同宿舍的姑娘的。女主躺在床上,想着该是默默饮泣?还是跑到男友公司大闹一场?但显然什么都没做,像她这样思想界的超人,生活界的胆小鬼,这么丢人现眼的事情做不出来,能做的就是在前男友 闺蜜的婚礼上,顶个淘宝定制款的假肚子,扮演生活幸福的贤良女子,给跌宕生活一个神转折。本以为远离过往就过上了平静生活,哪曾想新报到的公司老板,竟是曾经为了报复前男友而意图在酒吧推倒的霸道总裁。到底是过上了拥有霸道总裁的幸福生活,还是一切终究是空欢喜的梦一场?
  • 云上摆渡人

    云上摆渡人

    苏文幻被父母逼着相亲。在一次相亲活动上,文幻对一神秘黑衣男子一见钟情,但却得知,黑衣男子并非来相亲,一切只是误会。文幻自高中时代就有一个富二代追求者,柳元皓。元皓的堂妹元灿是文幻闺蜜。元皓想和文幻结婚,但文幻渴望得到真爱。文幻儿时经历过一些创伤,一直有轻度抑郁症。曾帮助她的女心理医生因要嫁去海外,把她托付给一位新来的心理医生——陆楷原博士。文幻和陆博士见面才发现,陆竟然就是那个让她一见钟情的黑衣男子。他决定放下一切顾虑,在全世界都唾弃文幻的时候,用自己的爱来拯救她,与她一起面对这个世俗。
  • 易象图说内篇

    易象图说内篇

    本书为公版书,为不受著作权法限制的作家、艺术家及其它人士发布的作品,供广大读者阅读交流。汇聚授权电子版权。
  • 白玉蝉

    白玉蝉

    陈致远死的那个晚上并无异常。十一点半蓝玲回到家里,他还出来过一趟,没戴眼镜,脸色疲倦,一年多了,他一直是那种脸色,黄中带青,眼睛下面有些浮肿。他刚画完一幅大油画,完成那天说最近什么也不画了,先把画室理一理,再带她去趟日本,结果没两天就又画了。蓝玲也不去说他。陈致远是去卫生间。蓝玲听他冲了马桶,洗了手,出来了,跟她说今天感觉不大好。她说,不大好就早点睡吧。他看着墙茫然了一阵,——后来无论怎么回想,蓝玲也未发觉那阵茫然有什么不对劲的,不大好,是人不大好?还是画得不大好?怔了二三十秒,看她打乱了头发,只穿着衬裙,知道她要洗澡,点头说,这就去睡。噢,好。
  • 通关文

    通关文

    本书为公版书,为不受著作权法限制的作家、艺术家及其它人士发布的作品,供广大读者阅读交流。汇聚授权电子版权。