8&0 
slightly angular and produced anteriorly, with nume- 
rous regular equidistant rounded transverse ribs 
becoming obsolete near the side, (especially the an- 
terior) the interstices smooth and broader than the ribs 
themselve ; beaks somewhat triangularly prominent, 
acute and slightly curved; lunule deep and cordiform, 
lozenge lanceolate: inside glossy white or cream color ; 
hinge with two strong teeth in each valve. 1...14. 
W. and Scotch Coasts. 
C. Compressa.—Venus C. Mont. Sup. p. 43. t. 
26. f. 1.—Pen. 4. p. 209.—Cyprina C. Turt. B. p. 
137. é.11. fi 21. to 23.—AstTarteE C. F. p. 440.— 
V. Montaauti. D.p. 167,—V. Montacutt. Turt. C. 
D. p. 243.—Roundish triangular, a little compressed, 
strong, thick, flattish, marked with rather distant trans- 
verse rib-like strize, white or covered with a yellowish 
brown cuticle; beaks prominent, giving that part a 
rather triangular outline; lunule elongated, inside 
white, with the margin flat, thin, and entire. 3. 
Scotland. 
** Margin crenulated. 
C. DanmonteEnsis. Lam.—VENUS SULCATA. Mont. 
p. 131.—Lin. T. 8. p. 81. t. 2. f. 2.—D. p. 166.— 
