NEMATOIDEA. 409 



This genus connects the Nematoidca with the Parenchymata. 



One species is known — Taenia lanceole, Chabert ; Polijstoma 

 tieiiioides, llud., Hist., II, xii, 8, 12; PentaHoma tcenioides, Id. 

 Syn., 123 — which attains a lengtli of more than six inches. It 

 is found in the frontal sinus of tlie Horse and Dog *. 

 This is probably the place for the 



Prionoderma, JRitd., 



Where tlie body and intestines arc very similar, but where the mouth 



is at the anterior extremity, simple, and armed with two little hooks. 



But one species is known, the Cucullanus ascaroides, Goetz., 



pi. viii, f. ii, iii ; Rud,, Hist., H, xii ; it inhabits the Siluri f. 



The following genus, which, when we are furnished with more 

 complete details of its economy, will have to be divided into several 

 genera, we think should be placed after the Intestinal Worms of this 

 order, but as a different family. 



Lern.^a, Lin., 

 Where the internal and external organization of the body is nearly 

 the same as in the Ncmatoidea ; 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 Lerneaj are also distinguished 

 by two cords, sometimes moderate, and at others very long, or even 

 mucli doubled, that are pendent from the sides of the tail, and which 

 may possibly be ovaries %. 



liERSiEA prope?-, 



Where the body is oblong, furnished with a long and slender neck, 



and a sort of horns round the head. 



L. branchialis, 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 I)rown. 

 Its more inflated body 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 



* The mouth of the Linguatul^e, Fioelich, is exactly similar to that of this Pea- 

 tastoma. I consequently presume that they belong to the same genus, although I 

 could not examine their intestines on account of their minuteness. Such are the 

 Teenia caprina, Gm., or the Pohjst. derdiculatum, Rud., Zool. Dan., Ill, c.v, 4,5; — 

 Linyuatula serrata, Ga. ; Pol. serratum, Rud. ; Froel., Nat. Forsch., XXIV, iv, 14, 

 15 ; the same as the Tetragula, Bosc., Bullet des Sc, May 1811, pi. ii. f. 1. These 

 "Worms now constitute the genus Pentastoma of Rudolphi, Syn., 12.3. M. de 

 Blainville prefers the name of Linguatule. The Porocephalus crotuU, Humb. Obs. 

 Zool., pi. 26, probably belongs to the same genus. 



•f- These two genera form the order Entomozoaires Apodes Onchocephales 

 of M. de Blainville. 



X M. Surrirey found ova in these cords of a Lernasa, which (ova) appeared to him 

 to contain an animal, analogous to one of the Crustacea, and very different from the 

 V'OL, IV. K E 



