190 
a fine point ; with regular equidistant, slightly oblique 
longitudinal furrows which are moderately deep but not 
not so broad as the corresponding ridges 5 aperture sub- 
orbicular, a little angulated both above and below, the 
inner Jip somewhat reflected. 74...0,06. Kent, Corn- 
wall, Devon, §c. 
T. Unica. F. p. 303.—Turso U. Mont. p. 299. t. 
12. f. 2 —D. p. 860.— (Walk. f. 40.)—Lin. T. 8. p. 
174.—T. Arsipus. Adams. t. 14. f. 17.—Glossy, 
pellucid, white, with nine whorls which terminating in 
aifme point are rounded, separated by a deep suture 
and wrought with fine longitudinal somewhat undulated 
ridges or stvize,whose interstices are extremely delicately 
and transversely striated; aperture suborbicular in- 
clining to oval. 0,20. Sandwich. 
T..Simttuima. F. p. 303.—Turso 8S. Mont. Sup. 
p. 136.—D. p. 856.—Wern. Mem. 1. p. 406. ¢. 8. f. 
15.—White, slender, with eight slightly elevated whorls 
adorned with fourteen distant ridges parallel with the 
axis of tne shell and narrower than the interstices ; 
aperture subovate. ¢. Jura. 
T. Nitipissima. F. p. 304.—Turpo N. Mont p. 
299. ¢. 12. f. 1—With nine extremely slender smooth 
