152 IXTEODUCTION TO CO^^CHOLOGY. 



Such, cousequently, are the haunts of all such species as 

 pertain to the above-mentioned genera. The first has dif- 

 ferent members, residing either in the Eastern Seas, or in 

 such as lave the shores of Xew Holland and the Mam*itius, 

 Avhere they exhibit pyramidally turreted shells, composed of 

 many whorls, forming an acuminated spire, and having a 

 small semi-rounded aperture, with the plaits of the columella 

 more than usually reverse. The latter present, hi their 

 typical form, the reverse of that abeady described as belong- 

 ing to the Pi/ramidella. Instead of a small aperture and 

 long drawn-out spu-e, the shell is of an oval Bulla form, 

 with a short spire and oblong aperture, reaching nearly to 

 the summit of the body-whorl. The plait or plaits of the 

 columella range obhquely, and are strongly developed. 



Among the few species yet discovered, the rarest and the 

 prettiest, T. coccinata, is from the Philippine Islands ; others 

 are from Japan, Peru, and the Red Sea. 



