CRUSTACEA. 625 



suspicion that the Lerncea also might belong to this class (DESMAREST 

 Cons. gn. s. la Classe des Crust, p. 344), but it was only after the observa- 

 tions of NORDMANN on the young form of Lernceocera cyprinacea, L. esocina 

 BURM. (Mikrogr. Beitr. n. Tab. vi. figs. 5, 6), that the matter could be 

 regarded as definitively settled. The young animal has three pairs of feet 

 and a single eye in the middle at the anterior part of the body. 



Pennella OKEN, nob. Head clavate. Two horns elongato-conical 

 at the base of head. Body straight, cylindrical, elongate, sub- 

 ially thick. Appendages small, disposed in pairs, resembling 

 ins, lanceolate, at the anterior part of body (rudiments of feet). 

 The posterior part of body as though pinnated, with several distinct 

 ilameiits. External ovaries round, very long. 



Sp. Pennella jilosa, Pennatula filosa GM., GUERIN Iconogr., Zooph. PL 9, fig. 

 3 ; habit, in fishes of the Mediterranean. 



Add genera Lerneonema MILNE EDWARDS, and Peniculus V. 

 NORDMANN, distinguished from Pennella by defect of the posterior 

 pinnated part especially. Genus Lerneonema perhaps ought not 

 to be separated from the Lerncece; comp. the forms of Lerncea bran- 

 chialis which KROEYER has delineated, i. PL 3, fig. 10. 



Sphyrion Cuv. 



Family III. Lernceopoda. Antennas small. Feet uncinate, 

 wo or more behind the rostrum ; natatory feet none. 



A. Body affixed by two round arms, grown together from their 

 3ase throughout their whole length or conjoined at the apex alone, 

 erminated by an adhesive disc. 



Anchorella Cuv. Body produced anteriorly into a cylindrical 

 art like a neck, rugose transversely. A short peduncle from the 

 wo arms coalesced at the base of the neck, with adhesive disc at 

 tie apex. 



Sp. Anckorella uncinata, Lerncea uncinata MUELL., NORDMANN 1.1. Tab.vm. 

 figs. 8 12. The characters of the genus apply only to the female, as 

 is common in the Lerncece. The male, which is much smaller, almost 

 spherical, has a conical rostrum, and two pairs of thick, short hooked feet 

 with one large and two smaller booklets. See NORDMANN 1. 1. Tab. X. fig. i. 



[Pentastoma RUD. ought to be brought here from the Entozoa, 

 according to VAN BENEDEN Mem. de I' A cad. roy. de Bruxelles, 

 1849, and Ann. d. Sc. nat. 3ieme Ser. Zool Tom. XL pp. 313 348. 

 See also above, p. 189.] 



Brachiella Cuv. Two arms extended in front of body, con- 

 oined at the apex alone, often very long. 



VOL. i. 40 



