Foraminifcra and Ostracoda. 233 



THE OSTRACODA. 



Family BAIRDIID^. 



Genus MACEOCYPEIS G. S. Brady. 



Macrocypeis simplex Chapman. 



Plate XXIX., tigs. 22, 22«, 22i. 



M. simplex Chapman, 1898, Ann. Mag. Nat. Hist., ser. 7, vol. ii., 

 p. 333, figs. la-c. 



There are two specimens of the ahove form in the present series 

 which agree with the example from the Cambridge Greensand 

 (rcmanie bed, chiefly of Albian age) of England. One of our speci- 

 mens — that figured — is slightly more arched on the dorsal side, but 

 the other is exactly comparable with the English specimen. 



Genus BYTHOCYPEIS G. S. Brady. 



Bythocypris sibiulata Jones sp. 

 Plate XXIX., fig. 20. 



Cijtlicrc faha Jones, 1849 (non Eeuss), Mon. Cret. Entom., p. 13, 



pi. ii., figs. 4a-c. 

 Cy there sinmlata Jones, 1870, Geol. Mag., p. 75. 

 Bythocypris simnlata Jones sp., Jones and Hinde, 1890, Mon. 



Cret. Entom., p. 11, pi. i., figs. 27-29. Egger, 1899, Abhandl. 



k. bayer. Akad. Wiss., CI. ii., vol. xxi., Abth. 1, p. 179, 



pi. xxvii., figs. 58, 59, 60. 



Two valves were found closely resembling the English Chalk 

 specimens. 



The example figured by Egger from the Upper Cretaceous of the 

 Bavarian Alps viewed laterally has the ventral margin straight. 



The South African specimens have the surfaces of the valves 

 minutely punctate, and the anterior border vertically striate. 



The ventral margin is distinctly undulate in side view. Length 

 of valve 1 mm., height '53 mm. 



