235 



on the roots of rufhes in marnies near FavcrJJmm. PofTi- 

 bly the marfhes where tliey were found, were llibjecl; to 

 the flux of the tide; for it is evidently a marine fliell. 

 We have found it plentiful on the fliore between PlyvwufJi 

 and Dock, feeding on atg(E at high-water mark; and alfo 

 fparingly on another part of the fouth coaftof DcvonJJiire, 

 as well as at Barnjlable and llfracomh in the north; near 

 Aberavon in Wales ; and at Southampton. 



Very young (hells fometimes pofTpfs only one fold on 

 the Columella ; in v\ hich flate we confider it to be Walk- 

 er's fliell, figure 53. 



A remarkable charafter of this fliell is, that the Columella. 

 extends no further than the upper part of the body volu- 

 tion: the fuperior fpires being dellitute of any pdlar, or 

 internal fpiral divifion. 



Voluta alba opaca longitu- Walk. Min. Shells, f. 61. Alii A. 



dinaliter Ilriata. Tart. Lin. iv. p 361. 



Adams Microjc. t. 14. f. 27. 



V. with an oval, white fliell, with four volutions, finely 

 flriated: aperture long, narrow. Length one tenth of an 

 inch. 



Mr. Boys favoured us with this minute fpecies, for 

 Walker's fl:ell above quoted. It is opaque, bui gloffy. 

 Said to be not uncommon at Sandwich and Shcpey IJland. 



H h 2 V. with 



