M BULLA. DIPPER. Class VI. 



6. DENTICU- Lin. Tr. viii. 122. lb. v. t. I. /. 3, 4, 5. 



LATA. 



* B. with an oblong, subequal, smooth, obtuse 

 slfell ; aperture with a sharp tooth at the end ; 

 small. 



Also found near Pembroke by the same gen- 

 tleman. 



7. plumula. Lin. Tr. viii. 123. Mont. Test. Br. 214. t. 15. 



f-9- 



* B. with a depressed, ovate-oblong, gaping 

 shell 5 length an inch and an half; breadth an 

 inch and a quarter. 



Discovered by Mr. Montagu at Milton 

 sands, Devonshire. 



8. halio- Lin. Tr. viii. 123. Mont. Test. Br. 211. t. 7. 



TOIDKA. f Q 



* B. with a pellucid sub-oval shell; aperture 

 dilated ; length three quarters of an inch ; 

 breadth half an inch. 



Devonshire and Dorsetshire. 



