186 CRUSTACEA. PHYLLOPODA. 



Gen. 5. CYPRIS, Mull. Monoculus, Jurine. 

 Body united to the head without trace of a segment, terminated 

 by a soft tail, folded below, and furnished with two filaments 

 at its extremity ; shell bivalve, oval ; a large spherical black 

 eye ; two antennas below the eye, long, setaceous, and termi- 

 nated by a bundle of twelve or fifteen hairs ; six feet. 



C. ornata, Mull. Shell greenish yellow, with green bands; 1| of 

 a line long. Desm. Crust. 383. 



C. ovata, Desm. Shell gibbous above, greenish, with an oblique 

 oval spot on each side. 1 line long. Desm. Crust. 383. 



Gen. 6. CYTHERINA, Lam. Monoculus, Fab. 

 Body inclosed in a bivalve shell ; head not distinct ; one eye ; 

 two simple setaceous antennas, formed of five or six joints ; 

 feet eight, pointed and furnished with some hairs. 



The animals of this genus inhabit salt marshes in the neighbourhood of the sea, 

 and live amongst the confervas. 



C. viridis, Lam. Shell short, reniform, green, tomentose. -J- of a 

 line long. Lam. v. 123. 



ORDER VII. PHYLLOPODA. 



Head not distinct from the trunk ; eyes sessile, smooth, ap- 

 proximate ; antennae very short ; a crustaceous buckler, free 

 posteriorly ; two corneous mandibles without palpi ; feet of 

 the first pair formed like oars ; the others, to the number of 

 sixty pairs, disposed for swimming. 



FAMILY I. ASPIDIPHORA. 



Eyes not supported on peduncles. 



Gen. 1. LIMNADIA, A. Brongniart. 



Body elongated, linear, inflected before, entirely inclosed in a 

 bivalve shell of an oval or compressed form ; two eyes ; two 

 large antennae below the eyes, half the length of the body, 

 bifid at the extremity and setaceous, and two smaller inter- 

 mediate ones ; trunk of twenty-three segments, the last, which 

 forms the tail, terminated by two diverging filaments -, feet 

 numerous, the first twelve pairs larger than the others. 



L. Hermanni, A. Brong. (Daphnia gigas, Hermann.) Colour whit- 

 ish, transparent. 4 lines long. Inhabits marshes in the neigh- 

 bourhood of Paris. Mem. du Mus. vi. pi. 13. 



Gen. 2. APUS, Scopoli. Limulus, Muller. 

 Body elongated, conical, of about forty narrow segments, of 

 which the last seven or eight, forming the tail, are destitute 



