OYPRINA. 



139 



the postero-dorsal margin has a greater ventral slope. G. protensa belongs to the 

 sub-genus Venilicardia, Stoliczka. 1 



Type. — In the Sedgwick Museum ; from the Pema-bed of Atherfield. 



Distribution. — Lower Greensand : Pema- bed of Atherfield and Sandown. 



Fig. 21. — Cyprina {Venilicardia) protensa, sp. nov. Lower Greensand (Pema-hed), Atherfield. 

 Sedgwick Museum. Eight valve, x i. 



Crackers of Atherfield. Ferruginous Sands of Shanklin (Meyer Collection). 

 Atherfield Beds of Peasemarsh. 



Cyprina Sowerbyi, d'Orbigny, 1850. Plate XXI, figs. 8, 9. Text-fig. 22. 



1836. Cyprina angulata, J. He G. Sowerby. Trans. Geol. Soc, ser. 2, vol. iv, 



p. 128. 

 E. Forbes. Quart. Journ. Geol. Soc, vol. i, p. 240 

 (partim). 

 Sowerbyi, A. d'Orbigny. Prodr. de Pal., vol. ii, p. 78. 

 angulata, /. Morris. Cat. Brit. Foss., ed. 2, p. 199 (partim). 



1845. 



1850. 

 1854. 



Measuremrnfs 



Length 

 Height 



(1) (2) (3) 



71 . 64 59 



GO 51 . 52 



(1, 2, 4) Hythe Beds, Hythe. 



(3) Lower Greensand, near Atherfield. 



(4) 



55 mm. 



48 „ 



1 'Paheout, Indica, Cret, Fauna S. India.' vol. iii (1870), p. 190. 



