144 



GENUS. AURICULA. 



* Suboval or oval oblong ; aperture longitudinal, quite 

 entire at the base and contracted above or its mar- 

 gins disunited ; pillar with one or more plaits; outer 

 lip either reflected outwards or simple and sharp 

 edged. 



A PERSONATA. Desk, in Lam. 8. p. 332. CARY- 

 CHIUM P. Mich. p. 73. t. 15. /. 42,3. VOLUTA 

 DENTICULATA. Mont. p. 234. t. 20. /. 5. ACTEON 

 D. F.p. 337. CONOVULUS D. Gray. Turt.p. 225. / 

 144. AUR. MYOSOTIS. Lin. T. 16. p. 368. VOLUTA 

 RINGENS & REFLEXA. Turt. J). TURBO BIDEN- 

 TATUS. Walker, f. 50,53. Oblong, brittle, smooth, 

 brown or purplish (sometimes nearly hyaline) ; spire 

 conical, varying in length ; mouth oblong, rather 

 thickened ; peristome slightly reflected ; pillar three or 

 five plaited ; outer lip more or less denticulated. A. 

 Clefts of rocks near high water mark. 



A. BIDENTATA. Eerussac.Lin. T. 16. /. 368. 

 VOLUTA B. Mont. Sup. p. 100. t. 30./. 2. D. p. 507. 



* Voluta Triplicate of Donovan (t. 138. Mont. Sup. 

 p. 99. Acteon T. F. p. 337.) is not a native 

 species. 



