:2 REPORT OF XEW JERSEY STATE MUSEU^I. 



Genus CYPRIDOPSIS Brady. 



Cypridopsis Brad}-, Tr. Linn. Soc. London, XXVL 1868. p. sj-,- Type Cypris 

 z'idua Muller. monotT.~pic. 



Second pair of antennae five-segmented. Xataton' setae at end 

 of third segment long and plumose. Branchia of second maxilla 

 consists of a plate bearing- five plumose setae or else of two setae 

 which are inserted directlv on the blade. Second foot five-seg- 

 mented, with strong- chitinous claw at its end. Caudal rami 

 rudimentary, flagellifomi. base turgid, a short cilium on dorsal 

 edg:e. 



Males unknown. Species about eleven. 



Cypridopsis vidua (Muller). 



Plate 14- 



Cypris Z'idua INIuller. Zool. Dan. Prodrom.. 1776. p. 200. Denviark. 



Cypridopsis viduo Sharpe. Bull. 111. Lab. X. Hist.. IV. 1897. p. 469 "ubiqui- 

 tous." 



Sharpe, Proc. L'. S. Xat. Mus.. XXX\". 1909, p. 400. "Common 



even"where." 



fCypris hispida (nee Baird 1835) De Kay, X'. Y. Fauna, Crust., VI, 1844, p. 

 64, PI. 10, figs. 48-49. Xeighborhood of Lake Champlain and Hoboken. 

 Xezv Jersey. 



Underwood, Bull. 111. Lab. X. Hist., II. Oct. 1886, p. 337. Xew York 



and X'ew Jersey. 



Description. — Seen from side shell partly kidney-shaped, 

 widest medianly. ventral edge straight except slight median con- 

 cavity', and other edges well convex. Seen from above shell 

 broadly ovoid, widest behind middle, ends rounded, and hinge- 

 line straight. Seen from below like upper view, slightly de- 

 pressed in center and contact line sinuous. Antennae five-jointed 

 and last or terminal joint small. Two terminal claws stout, and 

 blunt teeth on inner edge of one. Xataton,- setae plumose, reach 

 a little beyond tips of terminal claws, ^landible stout, and claws 

 of palp reach to ends of mandibular teeth. Antepenultimate joint 

 of palp with short pectinate dagger-shaped seta. Abdominal 

 rami rudimentar}-, long slender terminal claw longer than ramus. 



