isl 
pillar, forming a slight depression but not an umbilictis ; 
operculum corneous, rayed with arched strie from the 
inner margin. Up tog...§. On Ulve and mud, about 
highwater mark, common but local, rare on open coasts. 
C. Susumsixicata. F. p. 308.—Ttrgo 8. Mont. 
p. 316.—D. p. 841.—Lin. T. 8. 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 
Ulvee, in the whorls being more tumid and in its umbi- 
hieus. 
C. Interrvpta. F. p. 308.-—Turzso T. Adams. 
in Tin. T.3. €. 1. f. 16,7.—Mont. p. 329.—Lin. T. 
8. p. 166.—D. p. 841.—An. Don. ¢. 178. f. 2.2— 
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. 4%...0,04. Devon and 
Cornwall, common at Margate in drift sand, 
