Class VI. BULLA. DIPPER. 257 



Gm. Lin. 3424. 106. ^.6.^.1. g. hydatIS. 



Lin. Tr. vlii. 123. ib. ix. Mont. Test. Br. 217. 



* B. with a pellucid orbicular shell, faintly 

 striated lengthways ; umbilicated at the end ; 

 diameter one inch ; inhabits the sea. . 



Western coast. . 



Gm. Lin. 3434-. - Mont. Test. Br. 2\Q. 10. AKERA. 



Lin. Tr. viii. 125. 



* B. with a pellucid ovate shell; end abrupt, 

 caniculated ; size of an hazel nut; inhabits 

 the sea. 



Scotland, Dorsetshire, Portsmouth. 



Lin. Tr. y'lu. \2Q. Voluta Jonensis. Br. Zoo/. 4to. 11. diapha- 



Mont.^Test. Br. 225. t. 7- iv. 101.* faZ). Ixsi. /g. 87- ^■^• 



f.Q. 



* B. with a very thin brittle shell, with two 

 small spires ; length three eighths of an inch ; 

 breadth two eighths of an inch; inhabits the 

 sea. Tab. Ixxiv. Jig. 2. 

 Devonshire. 



VOL. IV. 



