161 
T. Crverarivs. Lin. 1229.—Last. ¢. 641. f. 31.— 
Ch. f. 1686.—Don. t. 74., upper and lower figures.— 
Pen. 4. p. 127.—D. p. 779.—Mont. p. 284.—F. p. 
322.—Lam. 65.—T. Linratus. Da Cost. p. 43. t. 3. 
J. 6—Dor. Cat. p. 43. t. 16. f. 11,2.—Conical, 
spirally striated, cinereous with fine approximate undu- 
lated brown longitudinally oblique lines; whorls little 
elevated, the suture slender; apex rather pointed ; 
mouth angulated ; umbilicus small but deep. #...%. 
Common on Fuci at low water mark. 
T. Tumipvus. Mont. p. 280. t. 10.f. 4.—Lin. T. 8. 
p. 153.—Dor. Cat. t. 16. f. 9,10.—F. p. 322.— 
T. Petruoxratus. D. p. 776.—Strong, subconical, 
tumid, with five projecting but not rounded volutions, 
ashy grey, yellowish (or rarely dark purplish brown) 
always more or less streaked with fine obscure undulated 
longitudinal lines, and striated closely delicately and 
spirally ; apex small but not taper; suture deep ; body 
whorl angulated at its lower edge, the base slightly 
rounded, the umbilicus small and distinct. 4. Devon 
and Dorset. 
T. Perroratus. Smith in Wern. Tr. 8. p. 99. t. 
1. f. 3,4.—Subconic, strong, greenish ash with fine 
obliquely longitudinal reddish brown lines under a thick 
