175 



C. STRIAIUI.A. F. p. 305, TURBO B.. Mont,, p. 

 306. t. 10. /. 5. D.p. 857,An.Lin. 1238./ lAn. 

 T. 8. p. 172. Dor. Cat. p. 50. t. 14. /. 10. T. 

 CABINATUS. Da. Cott. p. 50. t, 14. / 10.- Whorls 

 four or five, flat above, white (semipellucid when recejit) 

 rather strong, base wrought with fine spiral striae, which 

 towards the upper part rise into three distant elevated 

 membranaceous ridges, the furrows deep and rounded at 

 the bottom ; strongly striated longitudinally from top to 

 base (chiefly conspicuous in the interstices) ; apex not 

 very pointed ; aperture suborbicular, angulated above, 

 marginated. 0,20... 0,1 7. Kent, Cornwall, not common. 



C, COSTATA. P.p. 305. TURBO C. Adams in Lin. 

 T. 3. p. 65. t. 13./. 13,4. Mont. p. 311.*. 10. /. 6. 

 D.p. SQQ.Lin. T. 8. p. \l.Walk. f. 47. T. 

 CRASSUS. Adams Micr. t. 14./. 20. Strong, subpel- 

 lucid, glossy, white, with four or five much raised and 

 well defined volutions, furnished with strong ribs 

 which terminate on the body whorl in a strong spiral 

 rib, and finely striated transversely (the striae most wn- 

 spicuous in the interstices) ; apex rather obtuse ; aper- 

 ture suborbicular, lip a little expanded, a groove behind 

 it extending behind the pillar to the aperture. 0,20... 

 0,05. Devon, Dorset, Pembrokeshire, (in drift sand) 

 not uncommon, in Scotland rare. 



