16 TERTIARY ENTOMOSTRACA OF ENGLAND. 



VII. PONTOCYPRIS, G. 0. Sars, 1865. 



1. Pontocypeis (?), 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, Brady, 1880. 



1. Bythocypris subrenifoemis, Jones Sf Sherborn. Plate I, figs. 19 a, b. 



Btthocypeis subeenifobmis, Jones & Sherborn. Geol. Mag., 1887, p. 387. 



In the genus Bythocypris, 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-bed " at Bracklesham (British Museum 1 ) coincides. It 

 approaches Gytherina abbreviata, 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 short, 

 and more incurved on the ventral edge than is our specimen. 



IX. BAIRDIA, M'Coy, 1844. 

 1. Bairdia subdeltoidea (Milnster). Plate I, figs. 15 a, b. 



Cythebe subdeltoidea, Milnster. Jahrbuch fur Min., &c, 1830, p. G4; and 1835, 



p. 446. 

 Bairdia subdeltoidea, Jones Sf Sherborn. Geol. Mag., 1887, p. 387. For synoDy ma 



see Monogr. Tert. Entoni., p. 52. 



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

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



1 This and other Ostracoda from Bracklesham were presented by Professor Judd, F.B.S., to the 

 British Museum in June, 1888. 



