1015 



i§tnm XXXII. 



PATELLA: 



SHELL UNIVALVE, SOMEWHAT CONICAL, AND WITH- 

 OUT A SPIRE. 



-JP W TV" 



Sub-divisions.']' 



* With an internal appendage at the summit. 

 #* With an internal transverse partition. 

 *** With the margin angular or irregularly 

 toothed. 

 With the summit pointed and recurved. 

 ***** With the summit obtuse, and the margin 

 entire. 

 ****** With a marginal fissure. 

 ******* With the summit perforated. 



* With an internal appendage at the summit. 



EQUESTRis. 1. Shell sub-orbicular, wrinkled, and 

 minutely striated longitudinally; summit la- 

 teral and obtuse. 



Patella equestris. Linnmis Syst. Nat. p. 1257. Martini, 

 i. p. 131. t. 13. f. 119 and 120. Bom Mas. p. 415. 

 Schroeter Einl.\\. Tp.Sd^. Gmeliti, p. 3691. Schrei- 

 bers Conch, i. p. 337. Brookes's Introd. p. 138. t. 9. 

 f. 122. BurroTvs Elements, p. 175. t. 21. f.4. 



f So many of Gmelin's descriptions appear to me to be wholly undeserving 

 of notice, that T have principally confined my attention to the Linuseaji Species, 

 aud to those which have been figured by Martini and Chemnitz. 



2 f2 



