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. 



r Ilarpa imperialis. Harpa nobilis. 



-r — H. ventricosa. H. articularis. 



H. conoidalis. H. rosea. 



n. 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. 



V- Dolium galea. Dolium variegatum. 



D. fasciatum. D. perdix. 



D. pomum. D. olearium. 



D. maculatum. 



9. Genus Buccimim. PI. 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 in all seas. Sixty-six living. Fourteen fossil. 

 -Buccinum undatum. Buccinum tenniplicatum. 



B. papyraceum. B. levigatum. 



H 



