34 Records of the Indian Museum. [VoL. XVIII, 
The shells are similar in shape to M. pyramis, s.s., but much 
smaller and thinner and with the lip slightly thickened anteriorly 
and the suture more impressed. Some of them, but not all, are 
characterized by the strong longitudinal sculpture of the upper 
whorls. ‘The ribs, however, are not well defined and barely even — 
distinctly tubercular, never at all produced, at their upper extrem- 
ity. The surface is of neutral olivaceous buff with red longitudi- 
nal markings. 
Measurements of Shells (tn millimetres). 
Length .. ee a SES 159 14°8 
Breadth- .. Bd pide Sy) 6 59 
Length ofaperture 227 6:2 6°3 6 
Breadth ef aperture “.< ~=2°9 3 2°8 
These shells, though clearly belonging to M. pyramis, afford 
an easy transition to the group Plotia, s.s. The fact that Nevill 
assigned them to M. scabra is, indeed, strong evidence in favour of 
the advisability of breaking down the separation between that 
group and Striatella. 
var. flavida (Nevill). 
(Pins, hes Oe platy. ie On) 
1885. Melania (Striatella) tuberculata, subvar. flavida, Nevill, op. cit., 
p. 244. 
Nevill gives no description of this variety. Shells exhibit 
considerable variation in shape, but are usually even broader than 
the typical form, and have the mouth more expanded and more 
oblique. The longitudinal ribs are quite obsolete. There is an 
indistinct smooth ridge running below the suture. The shell is 
moderately thin and resembles the var. puteicola, but is usually 
paler in colour. Sometimes, however, the colour approaches that 
of the var. luwteomarginata and the sutural ridge is often distinctly 
paler than the remainder of the surface. 
Measurements of Shells (in millimetres). 
Hurmuk Persian Baluchistan. 
— OT - 
Length De TLOO ES 5s L72e. BOF 272 ee 
Breadth fe (OA 85 a) TO: 3) O° On M7. 
Length of 
aperture .. Gas 42ON WNOI7: (STOO) IO eee 
Breadth of 
Aperturen 3374 esis aie eee 6:23). 5101) 449 
The central tooth of the radula is produced at either side into 
a distinct angle and is asymmetrical. It has three cusps on the 
left side of the middle enlarged, one and two on the right. The 
lateral tooth is considerably narrower but has very similar cusps. 
The marginal teeth are subequal, both broader than the lateral, 
and have a large number (at least ten) of sharp cusps on each. 
