58 GO^CRYLIA—DITHYRA. 20. 



Shell oval inequilateral and red. 



Tab. nost. 11, fig. 7 and 8. 

 Cardium rubrum. Montagu, Test. Brit. p. 83, tab. 27, fig. 4. 



Linn. Trans, viii. p. 66. 



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



Turton, British Fauna, p. 153. 



Wood, Conch, p. 213. 



Dillwyn, DescrijJt. Catal. p. 131. 

 Cardium laeve. 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— TLTRTOAT. 



Testa ovata vel oblonga, cequivalvis, infequilateralis, subclausa. Cardo 

 dentibus duobus in utrdque valvd, cum fovea interpositd : lateralibus 

 nullis. Ligamentum internum. 



