Class VI. BULLA. DIPPER. 255 



Gm. Lin. 3424. Mont. Test. Br. 208, id. 3. aperta. 



Lin. Tr. viii. 121. Sup. 94. 



* B. with a pellucid shell, somewhat orbicular, 

 faintly striated crosswise, entirely gaping j dia- 

 meter from half to one inch. 



Found on the coast of Anglesey and Lljn, 

 and on the western and southern coasts. 



Lin. Tr. viii. 122. Mont. Test. Br. 215. t. 7. 4. catena. 



I. 



I; * B. with an oval pellucid shell, striated cross- 

 wise, spiral ; and obtuse ; minute. Lihabits 

 the sea. 



Found among sand, by Mr. Montagu, in 

 Bigberry bay, Devonshire. 



Lin. Tr. viii. 122. ih. v.t.l. f. 9, 10, 11. 5, EMARG£- 



NATA. 



* B. with a gibbous shell ; aperture emarginate. 

 Inhabits the sea. 



Found near Pembroke by the late Mr. 

 Adams. 



