184 SPECIFIC 



them from others by the meaning they convey, and 

 not merely by their verbal sound. 



Fig. 2. BucciNUM Pseudodon. 



Shell oblong, solid, transversely striate ; whorls 

 obtusely carinate, surrounded with transverse raised 

 bands; aperture crenate, columella with two plaits. 



Nondescript. 



Specimen white covered with a transparent 

 brown epidermis; raised bands dark brown ; aper- 

 ture white, ovate ; a few elevated striae above the 

 plaits on the columella, which is rather impressed 

 towards the upper part; lower part of the outer 

 lip furnished with the rudiments of a spine or tooth. 



Habitat unknown. 



The specific name Pseudodon has been assigned 

 to this shell because the thickened internal rib, 

 which is situated in the same part as the spine in 

 B. Monodon, does not project beyond the margin, 

 and has the appearance of a Ja/se rather than of 

 a perfect /oo^/z. 



Fig. 3. B. StrombifGrme, 



Shell oblong, longitudinally plaited ; outer lip 



