72 REPORT OF NEW JERSEY STATE MUSEUM. 



Genus CYPRIDOPSIS Brady. 



Cypridopsis Brady, Tr. Linn. Soc. London, XXVI, 1868, p. 375. Type Cypris 

 vidua Miiller, monotypic. 



Second pair of antennae jEive-segmented, Natatory 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 setas 

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

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

 rudimentary, flagelliform, base turgid, a short cilium on dorsal 

 edge. 



Males unknown. Species about eleven. 



Cypridopsis vidua (Miiller). 



Plate 14. 



Cypris vidua Miiller, Zool. Dan. Prodrom., 1776, p. 200. Denmark. 



Cypridopsis vidua Sharpe, Bull. 111. Lab. N. Hist., IV, 1897, p. 469 "ubiqui- 

 tous." 



Sharpe, Proc. U. S. Nat. Mus., XXXV, 1909, p. 400. "Common 



everywhere." 



f Cypris hispida (nee Baird 1835) De Kay, N. Y. Fauna, Crust., VI, 1844, p. 

 64, PI. 10, figs. 48-49. Neighborhood of Lake Chaniplain and Hoboken, 

 New Jersey. 



Underwood, Bull. 111. Lab. N. Hist., II, Oct. 1886, p. 337. New York 



and New 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. Antennas five- jointed 

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

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

 a little beyond tips of terminal claws. Mandible stout, and claws 

 of palp reach to ends of mandibular teeth. Antepenultimate joint 

 of palp with short pectinate dagger-shaped seta. Abdominal 

 rami rudimentary, long slender terminal claw longer than ramus. 



