. Zoology : for students and general readers . Zoology. 36 ZOOLOG T. cavated a mouth and a throat leading to a so-called stomach or digestive cavity. Two hollows in the body form the con- tractile vesicles, and an- other cavity constitutes the reproductive organ. Prolongations of the body- mass form the cilia, which characterize the Infusoria and give the name to the present order, Ciliata. Paramecium has an elon- gated, oval body "with one end {H) flattened out broader than the other, and twisted about one third way round, so that the flattened part resem- bles a very long figure
. Zoology : for students and general readers . Zoology. 36 ZOOLOG T. cavated a mouth and a throat leading to a so-called stomach or digestive cavity. Two hollows in the body form the con- tractile vesicles, and an- other cavity constitutes the reproductive organ. Prolongations of the body- mass form the cilia, which characterize the Infusoria and give the name to the present order, Ciliata. Paramecium has an elon- gated, oval body "with one end {H) flattened out broader than the other, and twisted about one third way round, so that the flattened part resem- bles a very long figure ; In this form, as well as in Stentor (Fig. 25), as Clark remarks, " we have the mouth at the bottom of a broad notch or incurva- tion, and the contractile vesicle on the oijposite side, next the convex back, whilst the general cavity of the body lies be- tween these ; The ated border of thediBk(5); «, the'largei- rigid jirrovvs in the fio-iivp vpnrp- ciliii; ra, tlie contractile vesicle in the extreme '"J^O"*' "^ ''"« ngUieiepiB through the whole thickuessof the ggi;^|; tj^g COUrSC of the par- body; C!)', ev^, the posterior prolongation of cv, ^ the distance; r, ?â ', the circular and radiating ticlcs of iudigO witll wllich i'Clark, was supposed to be ^, , â ^ , .. rphus, magnilied 130 dianieters, expanded and bent sligliUy over to- ward the observer; the mouth m, next the eye, and tile dorsal edge in the distance, a, poste- rior end; sh, the tube enclosing « ; c, the cili- fed his specimens, they are whirled branches of what, by Clark, was KuppOL ^^ .,â a rudimentary nervous system; n, n^, the re- Clark productive system, extending from the right side, at 7i, posteriorly, but toward the eye at n^. aS along, by the large vibrat- ing cilia (v) of the edge of the disk, against the vestibule of the ; During the circuit the food is digested, a mass of rejectamenta is formed near the protuberance, a, which has
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1879
