128 MR. G. NEVri.L ON THE [Feb. 17, 



scentes, ultimo longiore, basi vix compresso ; apertura ampUor, 

 inferne minus contracfa, margine columellari rectiore. 



Long. .5, diam. If millim. 



Type, Indian Museum, Calcutta ; also in coll. MM. Bourguignat, 

 Coombe Williams, P. Joly, P. Fagot, and Colonel Godwin-Austen. 



This was exceedingly abundant in deposits A, B, C ; I found a 

 single specimen in deposit F, of a short thickset variety (var. 

 tumida), probably enough a distinct species. Typical Pvpa bipli- 

 catii, Mich., and P. ressmanni, Villa, are the nearest forms I know 

 to P. hourguignatiana ; from both the present species can be told 

 at once by the above-described characters of the aperture. A speci- 

 men from Tuscany, which I obtained from Madame Vimont at 

 Paris, labelled P. hiplicata, is a totally distinct species from the 

 Menton one ; it is the P. toscanice of Bourg. 



Var. PLAGiosTOMA, nov. (Plate XIII. fig. 6.) 



(An potius Pupa plagiostoma, n. sp. ?) 



This is a well-marked and very distinct form, distinguishable at a 

 glance by the characters of the aperture, which a])pear to be con- 

 stant'; it was by no means rare in deposits B and C. 



Spire slightly convex, less gradually tapering (or turreted); whorls 

 S\, the first 3|, increasing rapidly, the others of almost equal 

 breadth, the last one longer in proportio;i, more compressed at its 

 base, so much so that it has a subcarinate appearance round the 

 umbilicus ; striation a little more distinct and more oblique ; aper- 

 ture quite differently shaped, not triangular, but more compressed, 

 narrowly oblong, as broad at its base as above ; both columellar and 

 parietal folds more twisted, tlie former less straightly transverse ; 

 the two palatal ones, seen through from the back, appear more 

 callous and to run into one another, in the type form they appear to 

 run more or less parallel ; the peristome even more callously 

 thickened, with its margins joined by a more developed callosity ; 

 the columellar margin has a very slight bend at its commencem.ent, 

 otherwise it is quite straightly oblique, without the characteristic de- 

 flection of P. hourguignatiana ; the callous tubercular tooth on the 

 outer margin equally prominently and robustly developed ; this tooth 

 appears to be peculiar in the group to the Menton species, in which 

 it exists in every specimen and in all the varieties, the other species 

 merely possessing a slight thickening in its place, as far as I know. 



Long. 4|, diam. 1| millim. 



Subvar. angusta, nov. 



This is a by no means rare form, which has decided me on not 

 specifically separating the preceding ; it has a similar aperture, as 

 also a coarser striation, but possesses 10 whorls, the first eight of 

 which are even more cylindrical than in the type form, and more 

 compressed, the last two being in proportion stouter and more 

 convex, imparting to the spire a remarkable emaciated appearance. 



Types of the variety and subvariety are in the Indian Museum, Cal- 

 cutta ; also in collections of MM. Bourguignat and Coombe Williams. 



