NO. 1347. FRESH- WATER OSTRACODA-SIIARPE. «»s7 



a peculiarity which may constitute this form a varioty, a,s N^ivra .spcak.s 

 of the European forms as havino- plain spino.s on this process. 



The terminal claw of the second foot is about one and one-half times 

 length of terminal segment. 



Furca very weakly S-shaped (fig. 0), about twenty times as long as 

 wide, dorsal margin smooth. Terminal claw weak, smooth, nearly 

 straight, four-sevenths as long as ramus. Terminal setu weak, al)()ut 

 twice as long as width of ramus. Subterminal claw about one-half 

 length of terminal on(% straight, smooth. Dorsal seta about length of 

 terminal one, weak. 



The specimens studied l)y me seem to be somewhat smaller than the 

 European form of this species as described by Vavra, but agree in 

 most other respects. The furca are of somewhat ditlerent propor- 

 tions; the European form with width to length about as 1 to 12, while 

 the American form exhibits a proportion of about 1 to 18. 



The anterior diagonal light patches are very well marked in this 

 species — so much so that even when examined with a hand lens they 

 attract immediate attention. 



The specimens examined b}^ me were collected by Dr. Alfredo 

 Duges (French Consular Agent) at Guanajuato, Mexico, April, lyoi, 

 ar.d sent to the U. S. National Museum. 



Distribution world-wide. 



6. CYPRIS PUBERA O. F. Miiller. 



Plate LXVII, tigs. 1-6. 



Mnnoculus ovatus Jurine, Histoire des Monocles, etc., 1820, p. 170, pi. wii, tigs. 



5-6; Geneve. 

 Cypris stricia Zaddach, Synopseos Crustaceoruni Prusyioornni Prodnnnns, 1S44, 



p. 32. 

 Cypris cuneata Baird, The Nat. Hist, of the British Entonios., Kay Soc, IS.iO, 



p. 256, pi. XVIII, figs. 22-24. 

 Cypris punctHlata Brady, A Monog. of the Recent British faitomos., Ray Society, 



1850, p. 365, pi. XXVI, figs. 1-7; pi. xxxxi, fig. 11. 

 Cypris 2>ubera 0. F. MtJLLER, Entomostraca, 1785, p. 56, j)! v, figs. 1-5.— 

 Zaddach, Synopseos Crustaceoruni Prussicorum Prodronius, 1844, j). 34.— 

 Fischer, Abhand. fiber das Genus Cypris, etc., M6m. des Savants Strangers 

 des sciences de St. Petersbourg, YII, 1851, \k 154, pi. viii, figs. 1-8.— Zenker, 

 Monographic der Ostracoden, Wieg. Archiv. f. Naturg., XX .lahrg., I, 1854, 

 p. 70.— Brady and Norman, A ]Monog. of the marine and freshwater Ostra- 

 coda, Sec. I, Trans. Royal Dublin Soc, 18s9, p. 74.— Vavka, Monog. der 

 Ostrac. Bohmens, Arch. Naturw. Durchforscli. v. Bnhnien, VIII, ISiH, p. MO, 

 figs. 2, 4, 30. 

 Length, 2.10 mm.; height. 1.25 mm.; ))readth, 1.20 nun. 

 This species is of a greenish color, with a darker patch at its highest 

 and central part, as seen from the side. A light yellowish band 

 extends diagonally backward from about the center of the shell. Shell 

 very sparsely hairy. 



