70 
PLEUROTOMARIA rotundata. 
TAB. DCXL .—Jig. 1 & 2. 
Spec. Char. Turbinate, irregularly striated; 
whorls 4 or 5, regularly convex; band rather 
broad, flat, slightly elevated, placed above the 
most prominent part of the whorl ; base con- 
vex ; columella solid, cylindrical, accompanied 
by a spiral ridge ; aperture nearly orbicular. 
Distinguished from Pleurotomaria [Helix) carinata of 
tab. 10. and fig. 3. of the present plate by its taller spire, 
rounder whorls, and smoother surface (see letter a ), but 
more particularly by the solid columella and its accompany- 
ing ridge ; the band also is less raised. Fig. 2. is from a 
younger, smoother, less elevated specimen, but it bears the 
characteristic ridge of the species. 
These specimens are I believe from Bolland; they are all 
I have seen of the species. 
PLEUROTOMARIA carinata. 
TAB. DCXL .—fig. 3. 
Spec. Char. Turbinate, conical, short, neatly 
striated all over in both directions ; whorls 5 
or 6, less convex above the band which is 
raised, convex and moderately broad ; base 
convex, umbilicated ; aperture rather angular. 
