128 BOOK OF SPECIES. 



distinct; extremities slightly beaked; base sul- 

 cated. 1. W. 17. 62. 



C. MONETA. Ovate^ marginated, yellowish 

 white ; margins tumid^ white, and nodulous ; base 

 flattened and white. U. W. I7. 43. 



C. ANNULUS. Ovate, gibbous, greyish yel- 

 low, with the back surrounded by a yellow line ; 

 the margin whitish, depressed, and smooth. y|. 

 W. 17. 44. 



C. RADIANS. Roundish, deep flesh-colour; 

 the dorsal line wide, on either side of which the 

 thick radiating ribs, which cover the flattened 

 base, and ascend to the back, end in tubercles. 

 |. W. 17. 58. 



C. PEDicuLus. Ovate, flesh-colour, often 

 with a greyish tint, with several chocolate-brown 

 spots, transversely ribbed; a narrow dorsal groove; 

 base sulcated. f. W. I7. 59. 



C. cocciNELLA. Much resemblcs the last, 

 but has no dorsal groove, not more than three 

 spots ; and the ribs much finer. B. f . W. 17* 

 60. 



TEREBELLUM. 



Convolute, sub-cylindrical, pointed at the summit ; 

 margin simple and acute; aperture longitudinal, 

 contracted at the upper part, notched at the 

 base ; pillar smooth, truncated at the bottom, 



T. suBU LATUM. Cylindraccous, subulate, thin, 

 smooth, glossy, with a distinct spire ; whitish^ 



