J 06 



3. Modiola cfr. simplex J. Sowerbî. 



Plate III, figs. 4 a— b. 



1850. Modiola simplex J. Sowebby, in Dixon's Geol. of Sussex, p. 117 and 



225; pi. 14, fig. 16. 

 1861. Modiola simplex J. Sowerby; S. Wood, Eocene Bivalves. I. p. 71; pi. 

 12, flg. 7. 



A rather well preserved imprint of a Modiola was found 

 in a concretion. Of all the forms with which I am familiar it 

 seems to have the greatest resemblance to M. simplex J. Sow; 

 however, I only know this species from figures and from a cast 

 from Bognor. The specimen in question differs from the above 

 mentioned species by being somewhat broader in front, and 

 moreover it seems to be a little more inflated. The umbo is 

 small, depressed and almost terminal. The shell has lines of 

 growth; otherwise it is smooth. 



The length is about 60 mm., the greatest height about 30 mm. 



By its form the specimen in question also resembles M. 

 Brocchii Mater, but the keel is not nearly so sharp as in the 

 latter species. 



The Coeloma-bed: 1 specimen. 



Occurrence. England: Eocene of Bognor, Herne Bay 

 (Wood). 



4. Cyprina sp. 



From the Cyrena-bed we bave two specimens (one right 

 and one left valve) of a Cyprina. [t is very flat, almost circular, 

 and only slightly inequilateral; the beak is only slightly projec- 

 ting. That the two valves really belong to a Cyprina is proved 

 by the nature of the hinge. By grinding I have succeeded in 

 demonstrating its close resemblance with the hinge of the genus 

 Cypri7ia. The paUial line is without a sinus. No lunule. 



1 have not succeeded in determining the species, the material 

 being insufficient for this purpose. 



Another shell from the Cyrena-bed also seems to belong 

 to a Cyprina, but most likely to another species. It is a little 



