CARDIUM.— Plate XVII. 



ber, squamiferous, scales erectly vaulted, numerous, 

 close-set, compressly flattened on the posterior side, 

 anterior scales obtusely thickened ; whitish or straw- 

 colour, stained and marbled, especially on the posterior 

 side, with brownish red, interior purple. 



Broderjp and Sowerby, Pro. Zool. Soc., 1833. 



Hob. St. Elena and Guacomayo, West Columbia (found 



in sandy mud at 

 thorns); Cuming. 



depth of from six to eleven 



This extremely interesting species differs from the Car- 

 ilium /.sotvn/itt in having the scales much more numerous 

 and close-set, and peculiarly compressly flattened one upon 

 the other on the posterior side. 



