62 NEW-YORK FAUNA — CRUSTACEA. 
ORDER VIII. LOPHYROPA. 
Head confounded with the anterior portion of the body. Eye or eyes sessile and compound. 
Shield variable in form and size. Mandibles without palpi. No branchie near the 
mouth. Feet variable in number, natatory, sometimes simple or branched, occasionally 
lamellar and furnished with hairs. 
(EXTRA-LIMITAL.) 
Genus Cycrors, Muller. Body elongated, narrowed behind, divided into transverse segments, of which 
the first is largest. Tail ending in two setaceous points. Antenne two to four, simple. A 
single eye on the back of the first segment. Feet six to twelve, hairy. 
C. navicularis. (Say, op.cit. Vol. 1,p.441.) Body oval, truncate behind. Tail as long as the thorax; 
terminal joint bifid, with four sete, and two small equal spines at the base of each pair of seta. An- 
terior antenne two-thirds the length of the body. Color, sanguineous; tail and feet white. Stag- 
nant fresh water. Southern States. 
Oss. Closely allied to this is a minute crustacean, found abundantly in deep water in Lake On- 
tario. Iam indebted to my friend Dr, Charles Pickering for the following notes on this animal. 
Genus ScorrpHora, Pickering. Body small. Eye single, near the anterior margin of the shield, 
Antenne large, and as long as in the preceding genus, and has the same motions in the water. 
Abdomen terminating in two styles, each with three sete; a brush under the last or last three 
joints. Ovaries none. Legs spiny. 
S. vagans. (Pickertne, MSS.) 
