128 • POST-TERTIARY ENTOMOSTRACA. 



8. CypRis REPTANs {Baird). Plate II, figs. 31 — 32. 



1835. Candona beptans, Baird. Trans. Berw. Nat. Club, i, p. 99, pi. hi, fig. 11 ; 



and Brit. Entom., p. 167, pi. xix, figs. 3, 3 a 

 (1850). 

 1856. — — Jones. Monog. Tert. Entom., p. 16, pi. i, figs. 7 a — 7 e. 



1853. Cypius — Lilljeborg. De Crustaceis, p. 123, tab. xi, figs. 21 — 23, 



t. xii, figs. 7 — 9. 

 1868. — — Brady. Monog. Recent Brit. Ostr., p. 370, pi. xxv, 



figs. 10 — 14, and pi. xxxvi, fig. 4. 



Valves oblong, subreniform, compressed, unequal, the left being considerably the 

 larger ; seen from the side the anterior and posterior extremities are obliquely rounded, 

 somewhat angular below and nearly equal in height, the posterior somewhat the higher ; 

 ventral margin slightly sinuated, dorsal straight or very slightly arched ; seen from above 

 the carapace is compressed, oblong-ovate, prominently keeled in front and below ; surface 

 perfectly smooth, and in recent species variously banded with shades of green, orange, 

 and brown. 



Length, j^th of an inch. 



Distribution. Recent. — Great Britain and Ireland, Sweden, Bohemia, Tyrol. 



Fossil. — England : Berkshire, Cambridgeshire, Essex, Hornsea, and Whittlesea. 



Genus 2. — Cypridopsis, Brady. 



Like Cypris, except that the post-abdominal rami are rudimentary, consisting of two 

 slender setiform prolongations thickened below and rising together from a common 

 base. The second feet are terminated by a short hooked claw, and two moderately long 

 setae. 



L Cypridopsis obesa, Brady and Robertson. Plate I, figs. 1 — 4. 



1869. Cypeidopsis obesa, B. ^ B. Ann. and Mag. Nat. Hist., ser. 4, vol. iii, 



pi. xviii, figs. 5 — 7, and vol. vi, p. 19. 



Carapace of the female, as seen from the side, subtriangular or subreniform, highest 



