9 6 



University of California. 



[Vol. 2. 



This species resembles Cypria Icevis (O. F. Muller)* in the sub- 

 angulate character of the dorsal margin. It differs markedly from 

 that form, however, in the great compression of the valves as seen 

 edgewise, the anterior end being quite sharp. In this latter char- 

 acteristic the form reminds one of Cypria OphtJiahnica (Jurine);f but 

 distinctly differs from it in the general outline of the valves. 



Cypris subangulata occurs at locality No. 589, Wild Cat Cafion, 

 where it is rare; and at locality No. 26, San Pablo Ridge, fairly 

 common. 



Cyclocypris, Brady and Norman, 1889. 



Cyclocypris Calif ornica, sp. nov., plate 3, figs. 4-6. 



Valves sub-ovate tumid. The posterior end broad and well- 

 rounded. The anterior edge meets the ventral margin somewhat 

 sharply, forming a decided angle. The dorsal margin strongly 

 curved, the ventral hollow towards the middle. In edge view the 

 carapace is rounded posteriorly and the anterior end is obtuse. 

 Length, one-twenty-fifth of an inch; height, one-fortieth of an inch. 



Cyclocypris globosa (G. O. Sars)J differs from the above species 

 in having both the anterior and the posterior ends of the valves 

 narrower, and the dorsal margin more strongly arched ; the thick- 

 ness of the carapace is uniformly greater than in C Calif ornica. 



This species, of which only one specimen was found, occurred 

 at locality No. 589, Wild Cat Canon. 



Cypris, Muller, 1785. 



Cypris procera, sp. nov., plate 3, figs. 7-9. 



Valves elongate reniform. Length, nearly twice as great as 

 the height. Greatest height slightly in front of the middle. The 



*Cypris lavis, Muller, 1785, Entom., p. 52, pi. Ill, figs. 7-9. C ovum, Brady, 

 1868, Mon. Rec. Brit. Ostrac, p. 373, pi. XXIV, figs. 31-34, 43-45, and pi. 

 XXXVI, fig. ?o 



f Monoculus ophthalmicus, Jurine, 1820, Hist, des Monocles, p. 178, pi. 

 XIX., figs. 16, 17. Cypris compressa, Brady, Crosskey and Robertson, 1874, 

 Monog. Postert. Entom., p. 123, pi. I, figs. 5, 6. 



\Cypris globosa, G. O. Sars, 1863, Om en i Sommeren, 1862, foretagen 

 Zoologisk Reise i Christianias og Trondhjems Stifter, p. 127. Cyclocypris 

 globosa, Brady and Norman, 1889, Trans. R. Dublin Soc, ser. II, vol. IV, p. 

 71, pi. XIV, figs. 1, 2. 



