CONCHOLOGY. 141 
Shell. Oval, inflated, rather thin, with longitudinal parallel 
ribs, formed by the perservation of the band of the right margin ; - 
the spire very short and pointed, the last whorl much longer than 
all the others together; aperture large, ovate, with a wide slope 
anteriorly ; the right edge much hollowed, and thickened out- 
wardly ; the columella smooth and terminated in a point ante- 
riorly. A beautiful genus. Found in the Indian Ocean. Nine 
species. 
Harpa imperialis. Harpa nobilis. 
H. ventricosa. H. articularis. 
H. conoidalis. H. rosea. 
H. minor. H. striata. 
H. mutica. 
8. Genus Dolium. PI. XII. 
Animal. As in Purpura. 
Shell. Subglobular, thin, surrounded by decurrent flutings ; 
spire very short, the last whorl much larger than all the others 
together; aperture oblong, very large, on account of the great 
excavation of the right edge, which is crenated throughout its 
length ; columella twisted. Found in the Indian Ocean and Medi- 
terranean seas. Seven species. 
Dolium galea. Dolium variegatum. 
D. fasciatum. D. perdix. 
D. pomum. D. olearium. 
D. maculatum. 
9. Genus Buccinum. Pl. XII. 
Animal. See Purpura. 
Shell. With a light epidermis, oval, elongated; the spire ' 
moderately elevated; aperture oblong, oval, notched, sometimes 
subcanaliculated anteriorly ; right edge thick, not reflexed; colu- 
mella simple and dilated superiorly ; operculum horny, complete, 
and oval. Found inallseas. Sixty-six living. Fourteen fossil. 
Buccinum undatum. Buccinum tenniplicatum. 
B. papyraceum. B. levigatum. 
