90 GENERA OF SHELLS. 



without a canal. Columella not flattened, 

 turgid above, undate curved. 



The buccina are marine shore shells, the greater 

 part very small, though some obtain a medium size. 

 Those which have a callous columella were separated 

 into a distinct genus called nassa, which has since been 

 reunited to buccinum. 



B. undatum, glaciale, Anglicanum, papyraceum, annula- 

 tum, laevissimum, testudineum, achatinum, glans, papillo- 

 sum, olivaceum, canaliculatum, crenulatum, reticulatum, 

 Tranquebaricum, lineatum, fuscatum, lineolaturn,maculosum, 

 politum, suturale, rnutabile, inflatum, retusum, ventncosum, 

 gemmulatum, Coromandelianum, fasciatum, miga, lyratum, 

 tricarinatutn, Brasilianum, semiconvexum, fasciolatum, vin- 

 osum, tenuiplicatum, subspinosum, Ascanias, Jaevigatum, 

 flexuosum, aciculatum, corniculatum, cribrarium, grana, 

 cocciriella, zebra, dermestoideum, aurantinm, pediculare, — 

 oniatum, armigerum, bezoar. 



Columella callous , (JYassa.) B. arcularia,coronatum, Thér- 

 sites, gibbulosum, pullus, marginulatiun, pauperatiim, poly- 

 gonatum, neriteum, — vibex, trivittata, obsoleta, acuta, 

 unicincta, alba, lunata. 



Eburna. Shell oval or elongated ; hp per- 

 fectly simple. Aperture longitudinal, emar- 

 ginate at base. Columella umbilicated at its 

 upper part and channelled below the umbilicus. 



Distinguished from buccinum by the singular posi- 

 tion of the umbilicus, of the columella, which is also 

 produced so as to form a canal, which occupies the 

 rest of the left lip. 



E. glabrata, zeylanica, spirata, areolata, lutosa, 



Terebra. Shell elongated, turreted, very 



