{60 
* Umbilicated: 
T. Macus. Lin. 1228.—D. p. 774.—Lam. 21.— 
List. t. 641. f. 32.—Knorr. 6. t. 27. f. 4.—Mart. f. 
1656.—Pen. 4. p. 127. t. 80. f. 107.—Don. t. 8. f. 1. 
Mont. p. 283 —Lin. T. 8. p. 151.—Dor. Cat. p. 
48. t. 16. f. 1.—F. p. 321.—T. Tupercuratus. Da 
Cos. p. 44. t. 3. f. 1.—Depressed-conical, thickish, 
with indistinct spiral striee, whitish with confluent pur- 
plish red radiating streaks; body whorl somewhat 
flattened and subtuberculated above, a raised spiral 
strize near the base of each of the six whorls; base 
slightly convex, umbilicus large and deep. Breadth, 1. 
Common. 
T. Umsinicatus. Pen. 4. p. 126.—Mont. p. 286. 
—Ch. f. 1685.—Da. Cost. t. 3. f. 4.-—Dor. Cat. t. 
16. f. 7,8.—T. Cinerarius. Don. 3. ¢. 74., three 
middle figures.—T. Osriquatus. D. p.779.—Strong, 
depressed, rounded at the top, the apex depressed and 
not pointed; volutions five and nearly even, suture 
fine; white or greenish with longitudinal purplish 
waved or ziczac lines and obsolete spiral striz ; aper- 
ture compressed, angulated umbilicus large and per- 
forated to the apex. #4. On Fuct, near low water 
mark ; very flat when young. 
