134 BOOK OF SPECIES. 



O. UTRicuLus. 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. 2J. 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. 2f . W. 19. 

 38. 



O. HIATUL.A. Ventricose, conic, whitish or 

 bluish ash-colour, with flexuous brown veins ; 

 spire prominent, acute; mouth dilated beneath. 

 1 J. There is a smaller variety marked with small 

 pale-brown spots, and the plaits of a maroon 

 brown. W. 19. 39. 



O. coNOiDALis. 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; |; 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 



