822 



FRESH-WATER BIOLOGY 



(87) Left shell same height as right, but longer. Terminal short setae of 

 second leg about as long as terminal segment. 



Cypria (Physocypria) inequivalva Turner 1893. 



~ Length 0.42 to 0.55 mm., height 0.35 



to 0.38 mm., width 0.26 to 0.28 mm. 

 Shell with irregular cross-shaped spots 

 dorsoanteriorly and posteriorly. Furca 

 curved, slender, its dorsal seta rudimen- 

 tary or absent. Males common. Amongst 

 algae of shallow ponds. Ohio, Georgia. 



Fig. 1288. 

 Cypria (Physocypria) inequivalva. (a) Side view, X 44; {b) Dorsal view; (c) Furca. 



89 (90) Dorsal seta of furca rudimentary or absent (Fig. 1289 c). 



Cydocypris laevis O. F. Miiller 1785. 



Length 0.45 to 0.48 mm., width 0.24 to 0.28 mm., 

 height 0.30 to 0.3s mm. Color lemon yellow to chestnut 

 red or horn brown. Plump, and left shell overlapping the 

 right anteriorly. Furca stout, nearly straight, six times 

 as long as wide. Terminal seta more than one-half length 

 of terminal claw. Common in weedy streams, ponds, and 

 swampy regions; April to November. Delaware, Indi- 

 ana, Illinois, New York, New Jersey. 



Fig. 1289. 



Cydocypris laevis. (a) Dorsal view, X 60: (b) Side view, X 451 



(c) Furca. 



90 (89) Dorsal seta of furca plainly well developed. Terminal claws of furca 

 strong, and much bent at tip (Fig. 1290 e). 



Cydocypris forbesi Sharpe 1897. 



Length 0.55 mm., width 0.36 

 mm., height 0.39 mm. A small 

 form. Plump and sepia brown in 

 alcohol. Natatory setae four times 

 length of terminal claws. Penulti- 

 mate segment of second antenna 

 with but one seta. Terminal seg- 

 ment of second leg three-eighths 

 as long as the preceding segment 

 (Fig. 1290/). Furca about eight 

 times as long as wide. Both ter- 

 minal claws strongly bent at tip, 

 nearly smooth. Right palp of sec- 

 ond maxilla of male larger than 

 the left one. Terminal seta about 

 as long as width of furca. Males 

 common. Ponds in woods; April. 

 lUinois. 



Fig. 1290, 

 Cydocypris forbesi. (a) Side view, X 

 60; lb) Dorsal view; (c) Second 

 antenna; (d) Maxillary palps of 

 male; (e) Furca; (f) Second leg. 



