312 



T. with a llrong, fub-pellucid, glofly, white fhell, 

 with four or five volutions, much raifed, and well defined 

 by the feparating line ; furnifhed with (Irong ribs, and 

 finely flriated tranfverfely, niofl confpicuous between 

 the ribs: apex rather obtufe: aperture fub-orbicular ; 

 lip a little expanded, bordered by a ftrong, prominent, 

 fulcated rim, flriated in the deprefiion : a ridge j-ifes at 

 the upper angle of the aperture, and runs tranfverfely 

 backward, then turns downward, and joins to the mar_ 

 gin of the lip behind ; this ridge is bordered above by a 

 fine depreffed line, where the longitudinal ribs terminate. 

 Length nearly one eighth of an inch ; breadth about one 

 third its length. Dead and worn flrells become opaque ; in 

 which Rate Mr. Walker defcribes itas rare atSandzvich. 



Mr, Adams found it on the coaft oi Pembrokc/Jiire. It 

 is not uncommon on various parts of the coaits of De~ 

 vonjhire and Dorfeljliire, efpecially in fand from Salcomb 

 bay ; we have alfo taken it in fand from Falmouth, and 

 other parts of CorntoaU. In a recent ftate, it is one of the 

 mofl beautiful microfcopic fhells, hitherto difcovered on 

 the (hares of Grcit Britain. 



20. 

 Striatus. 



Turbo flriatus. Lin. Trans.in. 'p.66.t.l3.f.25.26.(Adan!f) 

 Walk. Min. Shells, f. 49. 

 Tiirt. Lin. iv. p. 4S3. 

 Turbo Shepeianus. Turt. Lin. iv. p. 501. 



Adams Microfc. t. 14. f. 22. 



T. with 



