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Show 420 INFUSORIA. diminished development o larire only in the f their vibratile or-gano( l). The v AGINIOOLA, Lam. . h . 1. hanous envelope; but we may ere w1th a < 1ap ) Seem to be TrlC ocer me optical illusion(2 . be allowed to fear there has been so TuBICOLARIA, Lam. · ly dt. ffer f rom th e Furcularire, by secreting The Tubicolar1re on . truct of foreign molecules, . 1 t bes which they cons f themselves in htt e u . f theil' body, like those o the r any portton o · lf but which do not . 1o.r m) The.i r rotat ot. y o rgan however sh.o ws 1tse Coralliferi (polyp leis . of the head of Polypl. out of the tube, near1 Y in the. mFa nner ommon on the Con1re rvre of . cies m ranee c There 1s a spe t l Blumenb.; Dutrochet, Ann. the mars h es-Vorti.c .e. lla tetrape ah a, rotatory organ 1. s d1' v1'd ed du Mus., XIX, xvm~ 1-10-W ose into four lobes. BRACHioNus, Mull. gans and a tail nearly similar to h. · with rotatory or The Brae 10Fm , t £ membranous or squamous 1 rire have a sor o . those of the urcu a '. k l'ke that of certain Monocuh. shield, which covers thelr hac t -- ORDER II. HOMOGENEA. . ther viscera nor The body of t h e Homogenea presents ne1 'J'rich.lon· .. XXIX 9-12; Encyc., XV, 19, 20; ( 1) Trichoda paxillum, Mull. ' ' gicattda, Mtill:, XXXI, 10. . 't ·-Tr. inquilina, M 11. (3) Prich. tnnata;-Tr. mgent a, HOMOGENEA. 421 other complication, and is frequently destitute of even the appearance of a mouth. The first tribe comprises those, which, with a gelatinous body more or less contractile in its different parts, still present external organs consisting of cilia more or less strong. When they have the form of a horn (cornet), from which the cilia issue as in the Polypi called Vorticelli£, we have the UaEOLARIA, Lam. When the body is flat, and these cilia are at one extremity, TRICHODA. When they surround the whole body, LEUCOPHRA. When some of them are stout, aud represent species of horns, KERONA. And when these pretended horns are elongated into threads, HIMANTOPES. The second tribe consists of those which exhibit no external organ whatever, if we except a tail. In CERCARIA, Mull. The oval body is in fact terminated by a thread. To this genus be· long (among others) those animalcules which are observed in the semen of various animals, and on which so many fantastic theories have been founded. When this thread is forked, as is sometimes the case, we have the FuRoooEROA of Lamarck. |
