97 
about twenty-six close-set rounded ribs, thickly clothed 
with obtuse round tubercles, which anteriorly project 
into very short spines ; beaks central, inside white with 
generally a chesnut anterior stripe reaching half-way 
-down the shell; margin strongly serrate. %. Torbay. 
The old shells in this and the succeeding species lose 
the tubercles and become wrinkled or scaly all over. 
C. Exicuum. Gmel. 3255.—Mont. p. 82.—Turt. 
B. p. 187.—Pen. 4. p. 186.—Lin. T. 8. p. 61.— 
Wood. G. C. p. 212.—Turt. D. p.31-—F. p. 422.— 
Dor. Cat. p. 31. #. 2. f. 11.—D. p. 114.—C. Pyea- 
M&UM. Don. t. 32. f. 3.—Subtriangular, tumid, sub- 
truncated anteriorly, whitish, rarely pink, with from 
twenty to twenty-four ribs clothed with rounded obtuse 
tubercles especially about the shorter side, the grooves 
of which are not always distinct, but towards the hinge 
transversely striated 5 inside often rosy, one of the teeth 
minute. 4. W. Coasts and Ireland. 
* * Ribs armed with transverse scales. 
C. Epure. Lin, 1124.—D. p. 127.—Lam. 31.— 
Ch. f. 194.—Pen. 4. p. 189. t. 53. f. 3—Mont. p. 
76.—Dor. Cat. p. 32. & 11. f. 1.—Wood. G. C. p. 
226. ¢. 55. f.4.—Turt. C.D. p. 30.—Da Cos. p. 180. 
E 
