1921.] N. Annandale & B. Prashad : Gastropods. 



II 



tinged and clouded with black above ; the free edge of the mantle 

 is bright yellow. The tentacles are leaden grey on the dorsal sur- 

 face, paler at the base and below. The eye-stalks are bright 

 yellow. 



Geographical dis/ribtttioii. — The species is only known from 

 small streams near Khandalla and Igatpuri (Pooua and Nasik dis- 

 tricts) in the Western Ghats and from altitudes between 2500 and 

 3000 feet. 



We may now give a description of the new species Pachylabra 

 nevilliana. The shell characters are so similar to those of T. nux 

 that we can best do so by means of a short comparison. 



Fig. 



2. — Photographs of the t)pe-shell of Pacliylabra nevilliana, natural 

 size. 



Pachylabra nevilliana, sp. nov. 



1S77. Ampullaria mix, var. (? n. sp.), Xevill, op. cif., p. 5. 

 1885. Ampul/aria mix, var. (? n. sp. 1, id., op. cit., p. 4. 



The species is considerably larger, stouter and more globose 

 than T. nux, the spire is more swollen, the body-whorl more trans- 

 verse, the aperture broader above, the suture more oblique and 

 the sculpture of the shell coarser and less regular. The external 

 colour is deep chestnut, with which the interior is also tinged. 

 The peristome is white. The scar of the operculum is relatively 

 smaller and its central ridge broader and flatter. 



We have extracted the radula from one of the shells examined 

 by Nevill, which have been in Calcutta for at least 60 years, but 

 still in several instances contain the dried animal in a fairly good 

 state of preservation. 



Type- specimens.— ^o. M 11864/2 Z. S. I. (Ind. Mus.) 



