CONCHYLIA— D/THFi?^. 14. 49 



Turton, Brit. Fauna, p. 147. 



Wood, Conch, ix 98. 



Dillwyn, Descript. Catal. p. 45. 



Turton, Conch. Diet. p. 101. 



Mus. iwat. From rocks in Torbay. 



Shell from half an inch to an inch in diameter, very variable in 

 shape, orbicular, oblong, or kidney-form, with the margin variously 

 indented, rarely entire : but all the varieties may be known by the 

 projecting teeth. 



Anatina testa convexd oblongd, angulis binis transversis, latere antico arctica. 



truncato, umbonibus terminalibus, cochlearibus rotundato-protensis. 

 Shell convex oblong, with two transverse angles, truncate at the 

 hinder end, the beaks terminal, and the teeth rounded and pro- 

 jecting inwards. 



Tab. nost. 4, fig. 7 and 8. 

 Mya arctica. Linn. Syst. Nat. p. 1113. 



Gmelin, Syst. p. 3220. 

 Turton, Linn. Syst. iv. p. 177. 

 Wood, Conch, p. 95, 

 Turton, Conch. Diet. p. 104. 

 Mus. nost. From a mass of Sertularia, in Dublin bay. 



Shell half an inch long and rather more than three quarters of 

 an inch broad, with the beaks prominent and close to the hinder 

 end, from which run two transverse ridges, one along the back 

 margin, and the other obliquely to the angle of the front margin : 



H 



