MOLLDSCA OF INDIA. » 



" Size : maj. diam. 2-3 ; alt. axis 3-5 mm. 



" This species may be known by its very large antepenultimate 

 whorl and the curved axis of the spire, and its strongly developed 

 peristome and smooth lower whorls. It formed part of a collection 

 of shells made by Mr. W. Robert, of the Khasi Hill Survey party, 

 in the Garo Hills, during the military expedition into them in 

 1872-73. Ten specimens were found." 



Constriction on side, behind tlie peristome ; sculptured throughout. 



DiPLOMMATiKA DOHEETYi, Godwin- Austen. (Plate LXY.figs. 1, 1«.) 



Diplommatina doherti/i, G.-A. P. Z. S, 1892, p. 513. 



Locality. Margarita, Upper Assam ( W. Doherty, in coll. T. H. 

 Aldrich). 



Original description: — ''^\ve\\ dextral, very tumidly fusiform, 

 strong, not rimate ; sculpture, fine rather distant costulation on all 

 the whorls ; colour very pale, with a pinkish tint or ochraceous ; 

 spire, sides flat, rapidly diminishing, apex acumiuate ; suture im- 

 pressed ; whorls 8, last 3 whorls with convex sides, the penultimate 

 the largest ; constriction on side, well behind the aperture ; the last 

 whorl rises near peristome ; aperture nearly circular, subvertical, 

 rounded below ; peristome double, outer somewhat reflected, and 

 sinuous on margin ; columellar tooth small, blunt, situated within 

 the aperture, in many specimens it is not seen when viewed directly 

 in front. 



•' Size : maj. diam. 3-0 ; alt. axis 6-4 mm. 



" This shell is from the Eastern Naga country ; there were two 

 lots in Mr. Doherty's collection — one with a iew specimens labelled 

 * Margarita,' another, a numerous lot, marked only ' Naga.' " 



Diplommatina thomsoni, Godwin-Austen. (Plate LXY. 

 figs. 2, 2 a.) 



Diplommathm thomsoni, G.-A. P. Z. S. 1892, p. 514. 



Locality. South Burrail {Godwin- Austen). 



Origiyial description : — " Shell dextral, elongately fusiform ; 

 sculpture, 3 apical whorls smooth, all the rest with very fine regular, 

 rather close ribbing ; colour whitish ; spire rather high, sides 

 flattened ; apex rather blunt ; suture moderately impressed ; whorls 

 7 5, sides convex, the antepenultimate the largest, last whorl 

 ascending near the aperture ; constriction lies directly behind and 

 adjacent to the peristome ; aperture oval ; columellar tooth small 

 for size of shell and lying within the aperture ; peristome as 

 usual. 



"Size: maj. diam. 2*4; alt. axis 5*0 mm. 



" I have named this species after Col. Mowbray Thomson, who, 

 at the time it was collected, accompanied our camp in his capacity 

 of Political Agent of Munipur, while the boundary of that State 

 was being surveyed by me in 1872-73 ; in carrying out this work 

 he rendered us great assistance, although much thwarted by the 

 unfriendly action of the Munipur Durbar. 



