OLIVA. CONUS. 135 
purplish zigzags, and some similar marking at the 
upper border. #...3. W. 19. 40. 
O. nana. Small, ovate, livid ash- colour, 
with brown or purple flexuous lines ; spire rather 
gibbous and prominent; columella with a callus. 
4. W. 19. 44. 
O. oryzA. Minute, ovate-conic, white, un- 
spotted; spire conoid. 7. W. 19. 46. 
CONUS. 
Turbinated, or inversely conical, convolute ; aper- 
ture longitudinal, narrow ; not toothed; effuse 
at the base. 
* Spire coronated. 
C. MARMOREUS. Oblong-turbinate, the sur- 
face covered with numerous sub-triangular large 
white spots set in a dark ground; spire crowned 
with tubercles, obtuse ; whorls concavely chan- 
nelled ; lip pinkish in the adult. 34. W. 14. |. 
C. ARANEOSUS. Turbinate, whitish, reticu- 
lated by fine brown web-like meshes, and usually 
with two brown interrupted bands; spire convex, 
obtuse, mucronated, crowned with tubercles. 234. 
W. 14. 3. 
C. NeBuLosus. Turbinate, coronated, thick, 
at times granulated, yellowish chestnut, marbled 
with white spots, and lineated with brown trans- 
