214 CARDIUM. 



PEA COCKLE. 



10. Cardium discois. C. testa suborbiculari, maximt convexa, valvulis 



oblique striatis. Act. Soc. Linn. 8. p. 67. 

 Shell somewhat orbicular, very convex ; valves obliquely striated. 

 Mont. Test. Brit. p. 84. Penn. Brit. Zool. 1812. 4. p. 190. 



A smooth, white shell, with oblique striae running in 

 acute angles, but so delicate as scarcely to be discerned 

 by the naked eye ; the hinge has a single primary tooth 

 in each valve ; lateral teeth remote. Size of a small pea. 



Mr. Montagu is doubtful if this be an English shell, 

 he having found but one dead specimen in the sand of 

 Falmouth Harbour. 



LENGTHENED COCKLE. 



11. Cardium elongatum. C. testa angulato-subovali, compressa ; costis 21, 

 rotundatis, leviter rugosis. Act. Soc. Linn. 8. p. 67. 



Shell subangular, suboval, and compressed ; ribs 21, rounded, and faintly 

 wrinkled. 



Mont. Test. Brit. p. 82. Penn. Brit. Zool. 1812. 4. p. 190. 



A small shell, about a quarter of an inch in diameter, 

 of a yellowish-white, or light red colour, with the poste- 

 rior side rather produced, and angular. 



Discovered by Mr. Montagu, in Salcomb Bay, Devon- 

 shire. 



