134 BOOK OF SPECIES. 
O. uTRicutus. Ovate-ventricose above, 
bluish ash-colour, with faint traces of the dark 
brown marbling of the under coating of the shell ; 
an oblique yellow zone with brown flames at the 
base of the body-whorl ; spire conoid, acute ; lip 
and columella white; the latter callous. 24. W. 
19. 37. 
O. acuMINATA. Elongate, cylindrical, whitish, 
marbled with ash-colour, usually with two distant 
fulvous bands; spire exserted, acuminated; mouth 
white; columella callous above. 23. W. 19. 
38. 
O. HIATULA. Ventricose, conic, whitish or 
bluish ash-colour, with flexuous brown veins ; 
spire prominent, acute; mouth dilated beneath. 
13. There is a smaller variety marked with small 
pale-brown spots, and the plaits of a maroon 
brown. W. 19. 39. 
O. conorpAuis. Ovate-conic, whitish or 
greenish cinereous, veined with brown; the upper 
margins with numerous fasciculi ; spire elongated, 
with its canal scarce evident; belt at the base 
divided; 2; mouth white. W. 19. 41. 
O. EBURNEA. Somewhat in shape resembling 
the last, but more elongated and cylindrical ; the 
aperture widening downwards, and filling but half 
the length of the shell; channel of the spire dis- 
tinct; white, or white with two zones of large 
