THE CRUSTACEA OF NEW JERSEY. 



Genus CYCLOCYPRIS Brady and Norman. 



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Cyclocypris Brady and Norman, Trans. Roy. Dublin Soc, (2) IV, 1889, p. 70. 

 Type Cypris globosa G. O. Sars, monotypic. 



First antennsc seven-jointed. Second antenme five-jointed in 

 female, six-jointed in male. Fourth segment of second antenna 

 of male with no sense organ on its distal end. Natatory setse 

 of second antenn?e reach far beyond tips of terminal claws. Palp 

 of both mandible and first maxilla normally developed. Second 

 maxilla bears a branchial palp and a plate. This branchial palp 

 in female un jointed, in male forming hooked prehensile organ. 

 Terminal segment of second foot long and narrow, three times 

 long as broad. Ductus of numerous long filaments and no dis- 

 tinct central axis. Vas deferens long and convoluted, copulatory 

 organ quadrangular. Males numerous. 



Cyclocypris laevis (Miiller). 

 Plate 17. 



Cypris lavis Miiller, Entomostr. Dan. Norweg., 1785, p. 52, pi. 3, figs. 7-9. 



(Marshes and pools.) Denmark and Norzvay. 

 Cyclocyprisl ccvis Turner. Geol. N. Hist. Surv. Minn., Zool. Ser., II, 1895, P- 



310, PI. 70, figs. 9-10. Jones Creek, Delaware. 



— Turner, Bull. Sci. Lab. Den. Univ., VIII, pt. 2, 1887, p. 14, PI. 7, figs. 



9-1 1. Jones Creek, Delaware. 

 — ■ Sharpe, Proc. U. S. Nat. Mus., XXXV, 1909, p. 400. New Jersey. 



Also Catskill Mountains, N. Y. 



Description. — Shell lemon-yellow to chestnut-red. Seen from 

 side highest point of shell almost exactly in middle, approxi- 

 mately seven-ninths as high as long. Dorsal margin rather 

 plainly humped in middle, posterior margin evenly rounded, 

 ventral margin nearly straight or weakly convex. Seen from 

 above shell egg-shaped, pointed anteriorly, left shell slightly over- 

 lapping right anteriorly, and greatest width in middle, width 

 slightly more than one-half or about three-fifths of length. Ter- 

 minal segment of second foot about three times long as wide. 

 Terminal claw about long as width of terminal segment, shorter 

 setcT about four times long as claw, penultimate segment about 



