TROCHUS. 69 
T. IMBRICATUS. Conical-pyramidal, longi- 
tudinally ribbed obliquely, whitish; ribs rather 
prominent at the margin of the whorls, which 
project in the lower part and are sub-imbricated ; 
beneath plano-convex, concentrically wrinkled. 
ee be. OW. 29. 104. 
T. zIzyPHINUS. Conic, whorls flat, and 
distantly striated transversely, with a thick pink 
and white articulated belt margining each; livid 
or fulvous white, clouded longitudinally with a 
darker colour; base flattish, imperforate; pillar 
smooth; mouth pearly. B.1. W. 29. 94. 
T. conuLus. Conic, smooth, shining, golden, 
or yellowish red, painted with chestnut; whorls 
flattish, margined; upper ones granulated; be- 
neath, size, and aperture as the last. W. 29. 93. 
T. GRANATUS. Ventricose conic, with trans- 
verse granulated striz, whitish, with longitudinal 
irregular scarlet streaks; summit acuminated ; 
base convex and oblique; diam. 12. W. 29. 97. 
T. rris. Obliquely conic, glabrous, greyish 
violet, with chestnut longitudinally flexuous lines, 
iridescent beneath the outer coating; whorls 
rather convex, the last sub-angular ; aperture very 
dilated; no umbilicus. 1;5...1. W. 30. 113. 
T.uMBILIcCATUS. Orbicular depressed, trans- 
versely striated, olive ash-colour, umbilicated, 
marked with rather broad, somewhat oblique, red- 
