CYPRINA. l;'7 



CynuNA, sp. Plate XX, []g. 1 I-. 



A few spcciiiious of a small ( 'i/priuu, with the .shell iiii|)ei'lectly [irescrved, 

 liave been found in tlie Sj)eetoii Clay (!_), 1). 



Cvi'KiXA ANGLICA, sp. nov. Plate XX, figs. 15, l(i. i'late XXI, fig. la, b. 



Description. — Shell of moderate size, oval, inflated, very inequilateral. Anterior 

 margin rounded, forming a continuous curve with the convex ventral margin. 

 Posterior margin less convex than the anterior, sometimes slightly truncated, more 

 or less oblique, usually curving gradually to join the ventral margin. Postero- 

 dorsal margin long, slightly convex. Antero-dorsal margin short, nearly straight. 

 Uinbones broad, anterior, curving inward and forward. I'ostero-dursal part of 

 shell slightly compressed; carina al)sent or indistinct, liiinuk' ovate, dei)ressed, 

 more or less distinc-tly limited. (Jrnamentation consists of growth-lines. 



Measurement : 



(2) (.-5) (4.) 



41 . 38 . 32 

 33 . 31 . 24 

 26-5 . 24 . lG-5 . 



(1 — 0) Crackers, Alhwfield. 



Affinilii'K. — ('. iiu(jllr(i does not appear to be closely related to any other 

 English species. Externally it shows some resemblance to G. (uujnlatn, 8owerby 

 (see below), l)ut is of much smaller size, more elongate, with a more or less 

 distinctly limited lunule, and either without a carina or with an indistinct carina 

 near the innbones. 



Iiemarls. — Nearly all the specimens show the two valves united, so that the 

 hinge and pallial line do not appear to have been seen by jirevious workers ; this 

 probably accounts for the fact that in several collections the species has been 

 referred to the genus Venus. A left valve, from which I have removed the matrix, 

 shows that the hinge agrees with ('ii^iriint, and that there is no pallial sinus. 



Type. — In the Sedgwiek Museum, Cauibi'idge. 



Distribatiuu. — Lower Ureensand (Crackers) of Athcrfield. Atherfield Beds of 

 Peasemarsh. 



CvriJiNA (Vkmlhaimha) pkotkxsa, sj). nov. IMate XXI, figs. 4 — 7. Text-figs. 



2U, 21. 



1845. Cyi'iuna .\NauLATA, E. Fm-hes. Quart. Joiirii. Gcol. Soe., vul. i, y. I'iO 



(^(iWi'm). 



