149 
CARDIUM angustatuni* 
TAB* CCLXXXIII. — Fig. 2, 
Spec, Char. Transversely elongated,, thin,, rather 
depressed ; costae 27 ; margin toothed ; an- 
terior side truncate, posterior rounded. 
In the front of this Cardium there is commonly a slight 
depression or sinus, from which the anterior side is rather 
produced; the cost© are rounded, and roughened by 
transverse striae, in decay they appear to be hollow. The 
length equals about two-thirds the width. 
By no means an uncommon shell in the Suffolk and 
Norfolk Crag, yet not formerly noticed : I have received 
it from Alderton near Woodbridge, by favour of the 
Rev. G. R. Leathes and Prof. Sedgewick : I have also 
found it at Bramerton near Norwich. 
CARDIUM edulina. 
TAB, CCLXXXIII. — Fig. 3. 
Spec. Char. Nearly orbicular, convex, slightly 
oblique, thick ; costae 18, rugose ; anterior 
side slightly truncated. 
Different from the C. edule, for which it is sometimes 
taken, in the form of the anterior side, which is not 
