22 BOOK OF SPECIES. 
There are five whorls, of which the body-whorl 
is almost twice as large as the spire; aperture 
white; diam. 13. W. 34. 127. 
H. mMeLAnotracus. Differs from the last 
only in its apex being yellowish, and columella 
and lip black. E. 462. 4. 
H. PELLIS-SERPENTIS. Umbilicated, sub- 
carinated, convex, orbicular, yellowish white, 
with zones of reddish-brown and white flames ; 
beneath, several series of spots of a like colour ; 
spire extremely obtuse; margin of outer lip white 
and reflected; diam. 13; the surface shagreened. 
W. 33. 39. 
H. uacrgea. Orbicular convex, imperforate, 
greyish, banded with brown or red, and marked 
all over with minute milky dots; spire retuse; 
mouth black; outer lip expanded, and its margin 
reflected; diam. 11. W. 34. 128. 
H. zonaria. Umbilicated, orbicular - de- 
pressed, smooth, whitish, banded with brown, and 
sprinkled with red spots; spire flattened; outer 
lip expanded; its margin white and reflected ; 
diam. 14. W. 34. 94. 
H. cirrina. Orbicular-convex, sub-umbili- 
cated, smooth, diaphanous and shining, generally 
pale yellowish or chestnut; last whorl girded 
with white or black; outer lip sharp; spire ob- 
tuse; diam. 14. W. 33. 81. 
