Class VI. BULLA. DIPPER. 259 



List. Conch, tab. 714. Jig. 70. Lin. Tr. viii. 127 . 15. cylin- 



DRACEA. 



cylindric. 



B. white, cylindric, a little umbilicated at the 

 end. 



About twice the size of a grain of wheat. 

 Tab. lxxiii. jig. 3. 



Lin. Tr. viii. 128. Mont. Test. Br. 223. t. 7./. 3. 16. obtusa, 



* B. with subeylindric shell; spire a little pro- 

 minent ; length a quarter of an inch ; breadth 

 one eighth of an inch. 



Coasts of Kent, Dorsetshire, and South 

 Wales. 



Lin. Tr. viii. 128. B. truncata. Mont. Test. Br. 17. retusa. 



223. t. 7./. 5. id. Sup. 98. 



* B. with a subeylindric shell ; spire abruptly 

 umbilicated ; length one eighth of an inch. 



Cornwall, Dorsetshire, and Devonshire. 



Lin. Tr. viii. 129. Mont. Test. Br. 222. t. 7-f. 4. lg UMBrLI . 



CATA, 



* B. with an oblong oval shell ; spire obtusely 

 umbilicated ; length one eighth of an inch ; in- 

 habits the sea. 



Discovered by Mr. Montagu at Falmouth. 



s 2 



