260 BULLA. DIPPER. Class VI. 



19. patdla. Lin. Tr. viii. 121. Mont. Test. Br. 207 . id. 



°P en ' Sup. 93. 



B. with one end much produced, and fusiform ; 

 the aperture very patulous. 



Weymouth. From the Portland cabinet. 

 Tab. lxxiii. Jig. 4. 



20. flexilis. Mont. Test. Br. Sup. App. 168. 



* B. with a pellucid horn-colored shell, flexible 

 when moist, much more wrinkled than the B. 

 haliotoidea, which it otherwise much resembles; 

 length half an inch. 



