181 



pillar, forming a slight depression but not an umbilicus ; 

 operculum corneous, rayed with arched striae from the 

 inner margin. Up o^...f. On Ulvce and mud, about 

 highwater mark, common but local, rare on open coasts. 



C. SUBUMBILICATA. P.p. 308. TURBO S. Mont. 

 p. 316. D. p. 841. Lin. T. S. p. 165. Dor. Cat. 

 p. 50. t. 18. f. 126. Smooth, rather glossy, conical, 

 the apex rather obtuse ; whorls four or five, very tumid, 

 the body whorl occupying above half of the shell ; aper- 

 ture oval, outer lip even, inner a little reflected, forming 

 a subumbilicus. ...0,06. Weymouth. Differs from 

 Ventrosus in the aperture not being contracted above 

 and in the greater proportional width of the base, from 

 Ulvce, in the whorls being more tumid and in its umbi- 

 licus. 



C. INTERRUPTA. F. p. 308. TURBO T. Adams, 

 in Lin. T. 3. t. 1. /. 16,7. Mont. p. 329. Lin. T. 

 8. p. 166. D. p. S4\.An. Don. t. 178. f. 2.? 



Conic, pellucid, glossy, white with interrupted longitu- 

 dinal ochraceous streaks, chiefly on the two basal 

 whorls and frequently forming two rows of oblong spots 

 on the body ; whorls five, not much rounded, the apex 

 moderately pointed ; aperture suborbicular, outer lip 

 not very thin, inner reflexed. f.,.0,04. Devon and 

 Cornwall, common at Margate in drift su-nd.. 



