298 AMERICAN JOURNAL 



from either of the others by its granulate surface, caused by 

 the decussation of the irregular oblique growth-lines, by close, 

 deeply impressed revolving strias ; also by its flames of brown 

 being narrower, more irregular, and by its much more promi- 

 nent revolving tooth or rib on the columella. 



In Hainesi the brown flames are, perhaps, still broader than 

 in Leai, but the great differences are in size and form, which 

 I have endeavored to show in Plate 20, fig. 2, representing C. 

 Hainesi. This species, described in 1856 by Pfeiffer, is now, 

 for the first time, figured. With regard to dimensions, the 

 following are the measurements : — 



Length. Diameter. 



C. Hainesi, 44 mill. 17 mill. 

 C. Leai, 68 " 19 " 



0. Hainesii is described by Pfeiffer from Cape Palraas, but 

 I have before me several specimens, belonging to Mr. Lea's 

 cabinet, collected by Dr. J. Wilson at Prince's Isle. 



