10 Records of the Indian Museum. fVot. XXIT, 



1S77. Ampullaria mix (typical), Nevill, Cat. Mcll. hid. Mas. Fasc. E., 



P- 5- 

 1S8.V Ampullaria mix, id., Hand List Moll. Ind. Miis. II, p. 3. 

 1918. Ampullaria nux, Annandale and Prashad, Rec. Ind. Miis. XVI, 



pp. 149, 150, pi. V, fig. 8. 



The shell is very small compared with other species of the 

 family (not more than 30 mm. high), and has 4^ whorls. The 

 apex is bluntl}^ pointed and the first 2\ whorls, which are always 

 slightly eroded, are minute. The third whorl is much larger but 

 shallow, band-shaped and much narrower than the body-whorl. 

 Its outlines are feebly convex. The suture is linear and slightly 

 impressed ; the whorls are not or very slightly flattened outside 

 it. The body-whorl is narrowly heart-shaped with the upper 

 extremity nearly straight and the lower pointed and turned in- 

 wards ; its outer outline as seen from above forms a regular curve 

 and is relatively short, while the inner outline is long and sinuate. 

 The whorl as a whole is by no means greatly swollen. The aperture 

 is oblique, rather narrow and pyriform. It extends upwards for 

 at least f of the height of the shell. The incrassate columellar 

 margin is narrow and is joined to the upper lip above by a thin 

 porcellaneous deposit ; it is considerably produced below the um- 

 bilicus, which is closed or rimate. The aperture as a whole pro- 

 jects outwards from the body- whorl and also forwards below the 

 umbilicus. In the latter region the surface of the whorl slopes 

 inwards and forwards. The surface has a matt appearance owing 

 to the minute sculpture which consists of minute longitudinal and 

 spiral lines crossing one another very regularly and closely, and of 

 coarse longitudinal sinuate striae. The periostracum is of a pale 

 yellowish olivaceous tint with ill-defined, longitudinal streaks of a 

 darker shade, and in some shells obscure narrow spiral bands of a 

 pale brownish colour can be detected on the external surface. The 

 mouth is pure white, but the interior of the shell is sometimes 

 tinted with brown. 



The outline of the operculum resembles that of the mouth. 

 The external surface is slightly concave and is covered with a deli- 

 cate brown periostracum. The scar on the internal surface is rela- 

 tiveh' large ; it is divided longitudinally by a narrow ridge and sur- 

 rounded completeh' by a groove ; its sculpture is lobose. The 

 nacre has a pinkish tinge.' 



The characters of the radular teeth '^ are well shown in the 

 figure. Unfortunatel}' we have no detailed description of the 

 animal. The following notes on its colouration were made from a 

 living specimen at Khandalla. The foot and mantle are yellowish, 



' Reeve's original figure and description are somewhat misleading. The 

 former gives the impression, owing to the position of the operculum, that the outer 

 lip is thickened, while the description, in stating that the columellar lip is unusall\' 

 callously reflected, does not indicate ih.at it is in close apposition to the surface ol 

 the shell. 



■2 The figure of the radular teeth, in our paper cited already, is rather poor- 

 It was unfortunately drawn from worn out teeth and does not show their real 

 characters. 



