CONCHOLOGY. 157 



H. rosea. The roseate Harp. 



Oblong-ovate ; flesh coloured, with roseate interrupted 

 bands ; ribs remote ; columella of a fine rosy hue. 



8. Dolium, The Tun Shell. Seven species. 



The shells of this genus are generally large, thin, and 

 globose, with a wide aperture, and toothed or crenated outer 

 lip ; they have a brittle and light structure, and although 

 some of them grow to a very large size, they retain their 

 characteristic fragility and thinness. 



Shell sub-globular, very ventricose, thin, encircled by de- 

 current flutings ; the spire very short ; the last turn much 

 larger than all the others together; aperture oblong, very 

 large, by the great excavation of the right edge, which is 

 crenated through all its length ; columella twisted ; oper- 

 culum unknown. 



DoUum galea. Dolium fasciatum. 



D. olearium. D. pomum. 



D. maculatum. D. variegatum. 



D. perdix. 



D. perdix. The Partridge Dolium. PI. 29, fig. 4. 



Species sub-umbilicated, ovate-oblong, thin, thickly rib- 

 bed, and convex ; colour reddish brown, clouded and spotted 

 with white. 



D. galea. The brown Tun. 



Species not umbilicated ; sometimes exceeds ten inches 

 in diameter. 



9. Buccinum, The Whelk. Fifty-eight species. 



Notwithstanding the divisions of the Linnaean Buccinum 

 into so many different genera, it still presents a great variety 

 and diversity of species. 



Shell slightly covered with epidermis, oval, elongated; 

 the spire middling elevated ; aperture oblong, oval, notched, 

 and sometimes sub-canaliculated anteriorly ; the right edge 

 thick, not reflected; columella simple and swelled at the 



