THE OSTRACODA 



819 



73 (74) Posterior margin of furca pectinate (Fig. 1280 c). 



Cypris (Paracypris) perelegans Herrick 1887. 



Length 3.60 mm., height 1.72 mm., width 1.40 

 mm. Color clear pale yellow, with a sigmoid 

 pattern in clear brown. Seen from above, the 

 shell is acutely wedge-shaped anteriorly. From 

 the side the upper and lower margins are nearly 

 parallel, with a large projecting tooth postero- 

 ventrally. Terminal segment of second leg with 

 two small claws and one seta. Dorsal seta 

 spine-Uke. Weedy ponds. Alabama. 



Fig. 1280. 



Cypris (Paracypris) perelegans. (a) Side view, X 9," 



(6) Dorsal view; (c) Furca. 



74 (73) Posterior margin of furca plain (Fig. 1281 c). 



Cypris (Paracypris) grandis Chambers 1877. 



Length 3.60 mm., height 2.09 mm., width 1.39 

 mm. From above, shell regularly elliptical. 

 Bluish white to pale greenish. Ponds along the 

 Arkansas River, Colorado. Altitude 8000 feet. 

 A doubtful form. 



Fig. 1281. 



(a) Side view, X 4: 

 .(c) Furca; (d) Maxillary palps 

 of male. (After Chambers.) 



Cypris (Paracypris) grandis. 

 (b) Dorsal view; ' " " 



75 (76) Terminal segment of second leg small, with two short claws, and a 



long reflexed seta (Fig. 1282 d). Second antenna of male 

 with two sense organs on fourth segment. 



Cypria Zenker 1854 . . 77 



76 (7s) Terminal segment of second leg long and narrow, with short claw, 



and two long reflexed setae (Fig. 1290/). Second antenna 

 of male without sense organs on the fourth segment. 



Cydocypris Brady and Nornun 1HS9 . . 89 



77 (78) Right-valve margin not crenulate anteriorly. Valves about the 

 same size (Fig. 1284 a-6). . . . Subgenus Cypria . . 79 



78 (77) Right-valve margin crenulate anteriorly. Valves of decidedly differ- 

 ent sizes (Fig. 1287 a-b). 



Subgenus Physocypria Vavra 1891 . . 87 



79(80) Terminal claws of second leg approximately equal (Fig. 1282(f). . 81 

 80(79) Terminalclawsof second leg evidently unequal (Fig. 1285 i). . . 85 



