THE CRUSTACEA OF NEW JERvSEY. 79 



Cypria dentifera Sharps. 

 Plate 18. 



Cypria dentifera Sharpe, Bull. 111. Lab. Nat. Hist., IV, 1897, p. 463, PI. 47, 

 figs. 6-1 1. Cincinnati, Ohio. 



Sharpe, Proc. U. S. Nat. Mus., XXXV, 1909, p. 410. Pond near West- 

 field, New Jersey. Also Long Island, N. Y. 



Description. — Shell seen from side hig-hest just posterior to 

 middle, quickly sloping posteriorly, more gradually anteriorly. 

 Anterior edge of right valve projects as by a line flange, receives 

 as in a pocket anterior margin of left valve, which anned with 

 row of eighteen to twenty tuberculiformi teeth Ventral edge 

 slightly sinuate at middle, anterior and posterior parts sparsely 

 hairy. Seen fromi side shell widest back of middle, blunt and 

 evenly rounded, sides nearly parallel, then quickly narrowing 

 anteriorly to rather pointed end. Natatory setee of second an- 

 tennae long, slightly plumose, three of them reaching entire length 

 of antennae beyond terminal claws. Terminal and penultimate 

 segment in female three times long as wide. Mandibles and 

 maxillae not especially marked. First pair of feet rather stout. 

 Terminal claw smooth, much bent, long as last three segments. 

 Terminal segment subconic, one-third long as penultimate, which 

 of same length as antepenultimiate. Latter with few scattered 

 setae dorsally, and short slender seta at inner apical angle, two- 

 thirds long as segment. Two terminal setae of second feet ap- 

 proximately equal, long as last segment, faintly toothed. Ter- 

 minal segment sinuate on its inner edge, two-thirds wide as long. 

 Penultimate segment three and three-fourths times long- as ter- 

 minal one, four times long as wide, dorso-basal edge somewhat 

 crenulate, inner finely ciliate, plumose seta at its middle point 

 and comb cilia at inner apical angle. Antepenultimate segment 

 long as penultimate, finely setose on its inner edge and with 

 rather stout plumose seta at its inner apical angle, long as seta 

 on penultimate segment. Long seta of terminal segment long 

 as last three segments. Caudal rami rather stout, about ten 

 times long as wide. Terminal claw stout, nearly smiooth, curved 

 beyond middle, and three-fifths long as ramus. Subterminal claw 



