. Text-book of zoology for junior students. Zoology. 120 IXVEUTEItUATE ANIMALS. time in the waiter ; but tliey finally attach tiienuselves to a blade of grass, and sniround themselves with a horny eaj)sule. If now, the encapsuled embryo should be swallowed liy the sheep, along with the grass on which it feeds, the embryo escapes from its horny covering, and makes its wa}' from the stomach of the sheep into the bile-ducts, where it becomes developed into the adult Liver-fluke. Order III. Turbellaria. The Turbellarian wormf) diHer altogether from the ])recedi]ig orders of .Scolecids in being mos
. Text-book of zoology for junior students. Zoology. 120 IXVEUTEItUATE ANIMALS. time in the waiter ; but tliey finally attach tiienuselves to a blade of grass, and sniround themselves with a horny eaj)sule. If now, the encapsuled embryo should be swallowed liy the sheep, along with the grass on which it feeds, the embryo escapes from its horny covering, and makes its wa}' from the stomach of the sheep into the bile-ducts, where it becomes developed into the adult Liver-fluke. Order III. Turbellaria. The Turbellarian wormf) diHer altogether from the ])recedi]ig orders of .Scolecids in being mostly aquatic in their and in being non - par:isitic. They never p )ssess siieking-discs or ceph- adic hiMiks, and their integ- ument is always furnished with vibrating cilia. A water-vascular system is al- ways ]iresent, but it appears .sometimes not to conniiuni- cate with the exterior. The aliment.'uy canal is some- times simjily hollowed out of the tissues and destitute of an aims, as in the Tri'inatodd, and at other times in a free space (body-cavity) and furnished with an anus. It may be sim])le or much brmu-l' The best known cjf the mcmbcis of this order are little, soft - bodied, o\'ate, r)r i.'lli]itic;d creatures, which ,-ni' connuonly found ire, iir in moist earth, .Mini skin in these curious little with cilia, and also contains. Fi,'. 7:..- Our ..f tilt Tiirlirlt'irt'in (/.f,- (â,./,.â./ Inm,'llu,i ), 0 ; pr I'li,l»,; .( Till. I'lmi-il'iil lHTVi-,-;ili-lioii, ]ilarv'.l ill thr .-mil , ]i;,|-l nf llir lââ|y. :,w\ .L'iviii- III!' nil 1" IS niili.'ilili- lil;ilirli,.s (â): ,, I'niis ; nl Vus rlrivns : r^ Vrsirnlll sriii- iiialis ; tnii 1 *|icii lir nl ln;ilr rcpo nl Mcf i\'(' ..i-;liis ; ( ; '!â t')\;ny : n Utrnis, ]i;irHy lillnl ivilli (-^.'-s ; ../ ll|.'liilir nl llic IVniiiIr irpi-,i,liH'to r;.-.'i IS ; rJ l!rcr|il.'irlllliiii s. 111- iiiis ; </(' .MlMiHiiiii .,',nâ
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1885
