16 TERTIARY ENTOMOSTRACA OE ENGLAND. 



VII. PONTOCYPRIS, G. 0. Bars, 1865. 



1. PoNTOCTPEis (?), sp. Plate I, fig. 13 a. 



A single, small, pitted valve, of uncertain alliance, but approximately like 

 some members of the genus Pontocypris, G. 0. Sars, occurs in a collection from 

 the Tertiary beds at Colwell Bay, ' Geol. Mag.,' 1887, p. 387. (British Museum.) 



VIII. BYTHOCYPRIS, Bradij, 1880. 

 1. Bythocypris anBBEmFonms, Jo7ies ^ Sherborn. Plate I, figs. 19 a, h. 



Btthoctpkis subeenifohmis, Jones & Sherborn. Geol. Mag., 1887, p. 387. 



In the genus Bijtliocypris, determined by G. S. Brady, 'Report Challenger 

 Ostrac.,' p. 45, the left valve is described as much larger than the right, and over- 

 lapping it above and below. In this character, and other features, a specimen 

 from the " Belosepia-bcd " at Bracklesham (British Museum^) coincides. It 

 approaches Cytherhia ahhreviata, Reuss, ' Haidinger's Nat. Abh.,' vol. iii, p. 52, 

 pi. viii, fig. 10; but it is too short and too high, and is not so truly reniform. It 

 has, however, the usual kidney-shape, and is also near B. reniformis, G. S. Brady, 

 'Report Challenger Ostrac.,' p. 46, pi. v, fig. 1 ; but this figured form is too sliort, 

 and more incurved on the vcnti-al edge tlian is our specimen. 



IX. BAIRDIA, M'Coy, 1844. 



1. Baikdia subdeltoidea {M'iiiisfer). Plate I, figs. 15 (?, ^^. 



Cythbee subdeltoidea, Miinster. Jahrbuch furMin., &e., 1830, p. 64; and 1835, 



p. 446. 

 Baiedia subdeltoidea, Jones Sf Sherborn. Geol. Mag., 1887, p. 387. For s\ non^ms 



see Monogr. Tert. Entom., p. 52. 



As mentioned in the ' Geological Magazine ' for 1870, p. 157, the little Batnlia 

 from the Sutton Crag ('Monogr. Tert. Entom.,' 1857, p. 52, pi. iv, fig. 2) may be 



' This and other Ostracoda from Bracklesham were preseutcd by Professor Judd, F.E.S., to the 

 British Museum in June, 1888. 



