58 CO^CHYLW—DITHYRA. 20. 



Shell oval inequilateral and red. 



Tab. nost. 11, %• 7 and 8. 

 CardiuDi rubrum. Montagu, Test. p. 83, tab. 27, fig. 4. 



Ltinn. Trans, viii. p. 66. 



Pennant, Brit. Zool. iv. p. 189, 



Turton, British Fauna^ p. 153. 



Wood, Conch, p. 213. 



Dillwyn, Descript. Catal. p. 131. 

 Cardium Ifeve. Walker, Test. Minut. p. 24, fig. 86. 

 Tellina rubra. Turton, Conch. Diet. p. 168. 



Mus. nost. In the crevices of marine rocks. 



Shell about the tenth of an inch in diameter, smooth, or ap- 

 pearing as if very finely shagreened, of an uniform rich crimson, 

 often paler or covered with a rough green or brown coat: inside 

 glossy purple: beaks near one end, prominent, under which the 

 margin slopes in an incurved manner towards the smaller end : 

 teeth minute, as in the last. 



20. MONTACUTA— ri7i2rO.V. 



Testa ovala vel ohlonga, ceqnicalvis, ineequilateralis, snhclausa. 

 Cardo dentibus duobus in tdrdque valvd, cum fovea inter- 

 positd : lateralibus nullis. Ligamentum internum. 



