145 



costatis ; sutura crenatd ; ultimo anfractu antice laevi ; supra 

 canalem transversim sulcato ; apertura angustd. 



Shell oblong, whitish, sometimes with a pale chesnut band ; 

 spire acuminated, volutions 6, longitudinally ribbed : suture 

 crenated, last volution smooth in front, transversely grooved 

 on the back of the canal ; aperture narrow. 



West Indies, Rev. L. Guilding. 



EXPLANATION OF PLATES XXXVI, XXXVII, 

 XXXVIII, XXXIX, XL. 



COLUMBELLA. 



(The figure at the end of each name, refers to the species in the text.) 



