Class VI. BULLA. DIPPER. 259 



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



DRACEA. 



B. white, cylindric, a little umbilicated at the "^ *" "^' 

 end. 



About twice the size of a grain of wheat. 

 TabAjiyim.. Jig. S- ' '■' ■■ ' " "* '^ 



Lin. Tr. viii. 128. iJfowif. Test. Br. 223. ^ 7-/. 3. jg^ qbtusa. 



* B. with subcylindric 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. RETDSA. 

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



* B. with a subcylindric shell ; spire abruptly , 

 umbilicated ; length one eighth of an inch. 



Cornwall, Dorsetshire, and Devonshire. 



Lin. Tr. viii. 12Q. Merit. Test. Br. 222. t.'J.f.^. ,_ 



^ ' "^ 18. UMBILI- 



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 



