554 



Records 0/ the Indian Masei 



[Vol. XXII, 



and the spire as a whole conical, but with the whorls tumid and 

 flattened above and the suture deeply impressed. The spire, 

 measured on the dorsal surface, is about as high as the central part 

 of the Ijody-wliorl on the same surface. In this view the body-whorl 

 is oblique and spiral and is considerably more than twice as deep 

 at its outer as at its inner margin. The whorl is somevi'hat com- 

 pres.sed from above downwards but strongly convex. In ventral 

 view the spire is somewhat shorter than in dorsal view and the bodj"- 

 whorl, without the mouth, forms almost an equilateral triangle the 

 apex of which is directed downwards. The upper part of the 

 whorl is greatly swollen but it recedes inwards towards the umbili- 

 cus somewhat abruptly. The aperture is large and patent, more 

 or less oblique and broadly oval. The outer lip is sharp and more 

 or less narrowly tinged v/ith black. The columella is arched and 



A, 



Fig. 7. — Living animals of Leryflwcoiicha /ecvfhts<f(\) and 

 Vivipara oxytropis ^ (S). Xat. size. 



its folds form a prominent ridge whicli is very little reflected over 

 the umbilicus. This ridge is highly polished and of a bluish white 

 colour, with which the whole interior of the shell is more or less 

 deeply tinged. The sculpture consists of numerous fine, almost 

 straight longitudinal ridges and frequently of close-set irregular 

 indentations which give the whole shell a malleated appearance. 

 These are more commonly present on the penultimate than on the 

 body-whorl. In immature specimens a blunt ridge runs round 

 the periphery of the latter whorl and even in large shells this is 

 sometimes represented by a fine line, which may bear very fine 

 cilia-like processes of the periostracum. 



The female shell is a little more globose than the male and 

 has the outline of the spire less broken (c/. figs, i, 2, pi. V). 



The operculum is thin and transparent, but hard and rather 

 brittle, of a deep uniform golden brown colour and distinctly 



