106 BOOK OF SPECIES. 
lower part ; two teeth at the base of the right 
lip; operculum oblong, thin, horny. 
C. peERuviANus. Deep brown, somewhat 
tinted with olive, transversely ribbed, and longi- 
tudinally wrinkled ; lip crenated; aperture white. 
a. W. 22. 56. 
HARPA. 
Oval, more or less inflated, with parallel inclined 
and sharp longitudinal ribs ; spire short; aper- 
ture notched at the lower part; no canal ; colu- 
mella smooth, flattened, und pointed at the base. 
H. ventricosa. Ovyate-ventricose, with broad 
compressed ribs, which are stained with purplish 
red, mucronated at their summit, with one den- 
ticle just beneath ; interstices white, and marked 
with chestnut arcuated or angular spots or lines ; 
pillar spotted with dark black and purple. 53. 
W. 22. 49. 
H. rosea. Ovate-sub-ventricose, thin; in- 
terstices as last, but also adorned with three series 
of rose-coloured spots; ribs narrow and distant; 
pillar pinkish. W. S. 4. 23. 
H. articutata. Differs principally from 
Rosea by being without the crimson spots, and 
having its ribs articulated with white and black 
alternately. EK. 404. 3. 
H. minor. Ovate-oblong, colouring much 
