CRUSTACEA. 625 
suspicion that the Zernea also might belong to this class (DEsmaREsT 
Cons. gén. s. la Classe des Crust. p. 344), but it was only after the observa- 
tions of NorpMANN on the young form of Lernocera cyprinacea, L. esocina 
Burm. (Mikrogr. Beitr. 11. Tab. vi. figs. §, 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- 
equally thick. Appendages small, disposed in pairs, resembling 
fins, lanceolate, at the anterior part of body (rudiments of feet). 
The posterior part of body as though pinnated, with several distinct 
filaments. External ovaries round, very long. 
Sp. Pennella filosa, Pennatula filosa Gu., GuéRIN Iconogr., Zooph. Pl.g, fig. 
3; habit. in fishes of the Mediterranean. 
Add genera Lerneonema Mitne Epwarps, and Peniculus V. 
NorpMANN, distinguished from Pennella by defect of the posterior 
pinnated part especially. Genus Lerneonema perhaps ought not 
to be separated from the Zernew; comp. the forms of Lernea bran- 
chialis which Kroryer has delineated, 1. Pl. 3, fig. 10. 
Sphyrion Cvy. 
Family II. Lerneopoda. Antenne small. Feet uncinate, 
two or more behind the rostrum; natatory feet none. 
A. Body affixed by two round arms, grown together from their 
base throughout their whole length or conjoined at the apex alone, 
terminated by an adhesive disc. 
Anchorella Cuv. Body produced anteriorly into a cylindrical 
part like a neck, rugose transversely. A short peduncle from the 
two arms coalesced at the base of the neck, with adhesive disc at 
the apex. 
Sp. Anchorella uncinata, Lernea uncinata Mvueuu., NorpMANN 1.1. Tab. vit. 
figs. 8—12. The characters of the genus apply only to the female, as 
is common in the Lernew, 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 hooklets. See NoRDMANN 1.1. Tab. x. fig. 1. 
[Pentastoma Rup. ought to be brought here from the Hntozoa, 
according to VAN Brnepen Mém. de PAcad. roy. de Brucelles, 
1849, and Ann. d. Se. nat. 3iéme Sér. Zool. Tom. x1. pp. 313—348. 
See also above, p. 189.] 
Brachiella Cuvy. Two arms extended in front of body, con- 
joined at the apex alone, often very long. 
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