102 
CARDIUM truncatum. 
TAB. DLIII.— -fig. 3. 
Spec. Char. Transversely ovate^ gibbose/ smooth ; 
posterior side obliquely truncated, longitudi- 
nally sulcated ; beaks small. 
Syn. Cardium pectinatum, Young and Bird, 226. 
pi. 8./. 5. 
Nearly as long as wide, most gibbose towards the 
beaks, the ridges between the sulci upon the posterior 
flattened side are scabrous. 
Specimens of this remarkable shell have been supplied 
to us by S. Hailstone, Esq., who found them in a gray 
sandy Limestone, along with Terebratulae, Pectens, and 
Aviculae, at Roseberry Topping, Yorkshire : also by 
Mrs. Murchison, who collected them on the Cleveland 
Hills ; and by Mr. Williamson, from Robin Hood’s Bay. 
At both these latter places they are composed of ferru- 
ginous sandstone, which from its friable texture appears 
to be produced by the decomposition of a limestone. 
It was also found on Brambury Hill, Sutherland, by 
R. I. Murchison, Esq. 
