96 



C. ECHINATUM. iw. 1122. D.p. 116. Lam. 12. 

 Pew. 4. p. 187. Da Cos. t. 14. f. 2. Don. t. 107. 

 /. 1. Mont. p. 78. Lin. T. p. 63. Dor. Cat. p. 

 31. *. 6./. 2. Wood. G. C. t. 49. /. l^.Turt. C. 

 D.p. 29.Turt. B. p. 183. F. p. 42l.(Youny 



0. CILIARE. Lin. fyc.) Suborbicular, convex, thin, 

 slightly oblique, brown or whitish, with eighteen ribs, 

 armed with numerous inflected sharp white spines, 

 curving towards the cartilage side, the posterior ones 

 thicker and more obtuse ; the grooves only striated. 

 2... 2. Common on sandy shores. 



C: OBOVALE. Sow. in C. I. C. ELONGATUM. 

 Mont. p. 82. Lin. T. 8. p. 67. Pen. 4. p. 190. 

 Wood. G. C.p. 214. D.p. l3l.Turt.D. p. 31. 

 Turt.B.p. 185. t. 13. /. 9. F.p. 422. Oval, in- 

 equilateral oblique, produced and subangulated ante- 

 riorly, pale rufous, with some obscure darker spots 

 anteriorly, tumid in the middle, with twenty-five prickly 

 ribs, the central flattened and separated by a fine line. 



1. Torbay. 



C. NODOSUM. Mont. p. 81. Lin. T. 8. p. 68. 

 Pen. 4. p. \8V.-Wood. G. C. p. 2l2.Turt. B. p. 

 186. t. 13. /. 9 Orbicular and rather flat, equilateral, 

 brown or whitish, very slightly angulated anteriorly, 



