258 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



(No. 43,822«) from the Calcaire grossier of France, the anterior 

 conical cavity exhibits traces of septa, and these have, as in the 

 present specimen, a small V-shaped line on the ventral side. The 

 remains, and coarsely fibrous nature, of the prominent median ridge 

 on the ventral surface of the present specimen, however, lead us to 

 refer it to the subgenus Belopterina, which includes two species — 

 B. Zevesquei, D'Orbigny 1 (the type), and B. Edivardsi, Deshayes. 2 

 The type-specimen of B. Edwardsi was obtained from the Calcaire 

 grossier at Chaumont, and is unique. Although B. Zevesquei is 

 extremely rare, two specimens have been recorded and figured by 

 F. E. Edwards 3 from the London Clay of Highgate. These two 

 examples are now in the British Museum collection (Nos. 69, 339 a and b), 

 and after comparing the present specimen with them, particularly with 

 the larger example, I am led to think that the Sheppey fossil is most 

 probably specifically identical with them. 



1 A. d'Orbigny : Paleont. univers., 1845, pi. vih, figs. 10-12. De Ferussac & 



A. d'Orbigny: Hist. nat. Ceph. acetab., 1835-1848, p. 295, Seiches, pi. xx, 

 figs. 11, 12. 



2 G. P. Deshayes : Anim. sans vertebres, vol. iii (1866), p. 620, pi. cvii, figs. 3, 4. 



3 F. E. Edwards : Eocene Mollusca (Mon. Pal. Soc), pt. i (1849), p. 37, pi. ii, 



figs, la-c (No. 69,3396), and d, e (No. 69,339a). 



