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Show 356 ENTOZOA. Tl intestine is straight and the from which issue little hooks. 1e Both the former and latter genital vessels are long and to~·tuous;remity. Near the mouth are ll t the posteriOr ex . open externa Y a A white thread enc1rcles the . Echinorhynchus. . I h two creca as· m ff two descen d"m g trunks in which I thmk ave mouth and glves o fa nervous system. recognized the appearance No "dea with the Parenchymata. This genus connec ts the cm,a.,t ol . lanceole Chabert; p ol ystoma · · known- .1. rema ' One spec1es 1s 1 . . 8 12• Pentastoma trenioides, ld. tamiot· a es, R u d ., Hist ., . I ' xu, ' ' . I 1 th of more than six mches. t 3 which attams a eng ) Syn., 12 - 1 . of the Horse and Dog(1 . is found in the fronta smus This is probably the place for the PniONODERMA, Rud. h body and m. testm. es are very similar, but .w here th. e Where t e . , "t simple and armed w1th two ht-mouth 1. s at the anter10r extrem1 y, ' tle hooks. . . k the Cucullanus ascaroides, Gretz., But one ~.P~~~es 1 sd nHo~nt, II xii. it inhabits the Siluri(2). p 1. V.l.l .l , f • u ' 111"' Ru ., lS ., ' ' . h · ch when we are furnished with The following ge_nus, V: 1 ' ·u have to be divided l t details of Its economy' WI more comp e e . th" k should be placed after the In-into several genefta,h;'e d:: but as a different family. testinal Worms o t IS or ' LERNlEA, Lin. Where the internal and external orgam.z atl· on o f the body is nearly L.lE Froelich, is exactly similar to that of this (1) The mouth of the LrNoUATU. h' t th belong to the s:~.me genus, although Pentastom:~.; I consequen tly presume t a ey t of their minuteness. Su c h ar e I could not examine their intestinles ondenact~oulant••""' Rud. Zool. Dan., III, ex, 4, · the Po yst tcu ....... , ' v · the Trenia capnna, Gm., or . R d. Froel. N:~.t. Forsch., XXl 'IV, 5;-Lingu.atula serrata, Gm.; Pul. serr~~:m, Bu~l~;. des S~., M:~.y 1811, pl. ii, f.l. 14 15· the same as the TETRAGULA, B ., f Rudolphi, Syn., 123. ' I • tl s PENTAsToMA o z· These Worms now constitute le genu Th Porocephalus crota t, M. de Blainville prefers the n:~.me of LINGUA~:L:~me g:nus. Ilumb. Obs. Zool., pl. 26, probably belongs to AroDES ONonootPR!:Ut (2) TI hese two genera form t ll e ord er ENTOMOZOAIREB of M. de Blainville. NEMATOID EA. 357 the same as in the Nematoidea; but it is prolonged anteriorly by a corneous neck, at the extremity of which is a mouth variously armed and surrounded, or followed by productions of different forms. This mouth and its appendages are insinuated into the skin of the gills of fishes, and fix the animal there. The Lernere are also distinguished by two cords, sometimes moderate, and at others very long, or even much doubled, that are pendent from the sides of the tail, and which may possibly be ovaries( 1 ). LERN..EA proper. Where the body is oblong, furnished with a long and slender neck, and a sort of horns round the head. L. brancltialis, L.; Encyc. Vers, LXXVIII, 2. The most known species; it attacks the Codfish and other Gadi, and is from one to two inches in length. Its mouth is surrounded by three ramous horns, which, as well as the neck, are of a deep brown. Its more inflated bbdy is bent into an S, and the two cords are contorted in a thousand different ways. Its horns become rooted, as it were, in the gills of fishes. Another, the L. ocularis, Cuv., fastens itself to the eyes of Herrings and other fishes; its horns are simple and short, two larger and two smaller; the body is slender, and its cords long and not doubled(2). L. multicornis, Cuv., is another with very numerous, smaU, and unequal horns, found on the gills of a Serranus in the East Indies. In another group, (1) M. Surrirey found ova in these cords of a Lernaea, which (ova) appe:~.red to him to contain an animal, analogous to one of the Crustacea, and very different from the Lernrea itself. This fact, added to the observations of Messrs Audouin and Milne Edwards, relative to the Nicothoe astaci, has inclined those naturalists to the opinion that most of these Lernreae may be Crustacea that have become monstrous subsequent to being fixed, :~.nd thnt the males remain free, which, according to them, expbins the circumstance of our being able to find females onlyAnn. des Sc. Nat., IX, 345, pl. xlix. Before this idea cnn be received as definitive, we must be able to nnd these males. (2) Add L. cyprinacea, L.; Faun. Suec., 1st edit., fig. 1282; Encyc., Vers. LXXVIII, 6;-L. surrirenairt, Blainv.;-L. lotre, Ilerm., Nat. l•'orsch. XIX, 1, 6? -L. cyclopterina. This group is called L.ERNEOCEREs by M. de Blain ville. |