MOLLUSC! OF INDIA. 181 



Mr. Edgar Smith very kindly allowed me to take it home in order 

 to soak it out, with the result that very much more detail has been 

 disclosed. Blanford, p. 275, says : — 



" Macrochlamys pumicata (Morelet), Journ. Coneh. iv. (1875) 

 p. 248, pi. xii. fig. 2. 



" A single specimen was sent, which, although very close to 

 Morelet's species, is perhaps not quite identical. JN^umerous additional 

 shells have been received by Mr. Preston. [' Common in evergreen 

 forest; never found in open or dry forest.' — W. M. D.] " 



The animal is dark-coloured. 



The mantle-zone was very well preserved (Plate CXVI. fig. 1 a) 

 and shows a rather broad and long tongue-shaped right shell-lobe, 

 no left shell-lobe * ; the right dorsal lobe large, the left anterior 

 ■dorsal lobe very small and narrow, the posterior narrower and 

 elongate and separated from the other. The genitalia were in good 

 preservation. A very long cylindrical amatorial organ with blunt 

 terminal knob ; the spermatheca a very elongate tube-like sac. The 

 male organ : the description of that of the Mergui resphndens will 

 apply to it in every detail, the same strong retractor muscle and 

 similar flagellum. 



The radula (fig. 1 6) agrees in every respect with the first species 

 examined, having the formula 



-j-18 , 1 . 11 . 1 . 11 . 1 . 18-h 



The central and admedian teeth are narrow, plain, straight-sided, 

 and pointed, at the seventh tooth an outer basal notch commences, 

 very minute. The laterals are narrow and bicuspid, the outer cusp 

 far below the point. 



The marginal teeth were not in place, so that the total teeth in 

 the row could not be counted ; they become very minnte, but are 

 still bicuspid. The jaw (fig. 1 c) is rather straight on the edge, with 

 a large central projection. 



In the other Siam species the shell is very distinct and appears 

 to be the following : — 



Sarika dohrniana, Pfr. ? 



Siam {Captain Stanley Flower). 



Shell closely wound, somewhat similar to that of resplendens of 

 Mergui. Sculpture smooth, no striation to be seen with high powers. 



The foot is divided ; right and left shell-lobes present, the right 

 rather lower down than in typical Macrocldamys. 



* Tliis requires verification ; sucl: a small flap as this left shell-lobe generally 

 is might very easily become detached, particularly from an animal left for 

 many years in a dried-up state. 



e2 



