36 Records of the Indian Museum. [VoL. XVIII, 
Measurements of the Shells (in millimetres). 
Persian, Baluchistan 
(Blanford). 
fo nt at ae 
Lengthiae: Ree nga 29.1 29°4 
Breadth. Se ce 9°9 10'8 
Length or aperture ..40 Lise LO 10°3 
Breadth of aperture .. 64 55 6°3 
Type-sertes. 1205, Zoological Survey of India (Ind. Mus.). 
We have extracted the operculum and radula from one of 
Blanford’s specimens. The former does not differ much from 
that of M. tuberculata but is rather larger and more pointed 
posteriorly. : 
The radula, while of the same type as that of the vars. /eo- 
pardina and flavida, differs slightly in the proportions and denti- 
culation of teeth (see fig. 4), all of which are larger and broader 
than those of var. flavida. The central tooth has two extra cusps 
on either side and the cusps of the other teeth are much larger. 
Those on the outer marginal are fewer, not more than seven. 
The variety is represented in the collection of the Zoological 
Survey of India by specimens collected by the late Dr. W. T. 
Blanford in Persian Baluchistan and at Kalagan in the south of 
Persia proper. 
Melanoides tigrina (Hutton). 
(Pl. iv, fig. 2.) 
1850. Melania tigrina, Hutton, Fourn. As. Soc. Bengal (2), XVIII, p. 658. 
This species is, as Hutton pointed out in his original descrip- 
tion, distinguished from all varieties of M. pyramis by the much 
greater smoothness of the shell, in which both the longitudinal 
and the transverse striae become almost obsolete towards the 
base. The shell resembles that of M. pyramis var. leopardina in 
shape, texture and colouration, but exhibits some variation in the 
extent to which the longitudinal reddish markings are developed. 
The specimens collected by Hutton and still in the Indian Museum 
are, as he stated, much eroded on the surface and have lost the 
apical whorls. We have examined, however, other examples 
from Quetta which are almost perfect. The shell only differs in 
form from that of M. pyramis var. leopardina in being still more 
acutely pointed, in having the whorls a little less convex and the 
suture slightly impressed owing mainly to a narrow flattening of 
the upper margin of each whorl. ‘The sculpture on the upper 
whorls, in unworn shells, is distinctly though minutely granular, 
but it becomes gradually less distinct towards the body-whorl, on 
which only a comparatively small number of lightly impressed 
spiral striae and very indistinct longitudinal striae can be dis- 
tinguished. 
