igiS.] H. H. Godwin-Austen : Mollusca, VIII. 589 



Shell finely perforate, turbinately conoid, flat on base; sculp- 

 ture none, a glassy surface ; colour pale greenish ochre ; spire 

 raised, flatly conic, apex rounded; suture impressed; whorls 6, 

 closely wound, regularly increasing ; aperture narrow and widely 

 lunate, sub vertical ; peristome thin, thickening to the umbilicus; 

 columellar margin oblique. 



Size: major diameter 8'o, minor 8'5, alt. axis 4*3 mm. 



This species comes very close to Tadunia oakesi of the Abor 

 Hills, but is more conical in form and flatter on the base. For 

 this reason I take the opportunity of describing it here. It is 

 No. 392 of the Beddome collection, and was collected for Colonel 

 Beddome by Mr. Muspratt who was in the Assam Police, after 

 whom it is named and who discovered many interesting new spe- 

 cies principally in the Eastern Naga Hills. 



Bapuia, gen. nov. 



Shell globose, thin. Animal with both right and left shell 

 lobes and short lobe above the mucous gland; peripodial margin 

 broad. Amatorial organ present in the genitalia, no coiled caecum 

 at the retractor muscle of the penis; spermatheca short, globose, 

 In radula the marginals are curved and aculeate. Jaw straight in 

 front with a central projection. 



The name is derived from the Peak of Bapu, 6290 ft. in 

 height, and a trigonometrical station which dominates Rotung and 

 Renging lying on the banks of the Tsanspu River on the North. 



Type: B. rengingensis, n. sp. 



Bapuia rcngingensis, n. sp. 



(Plate H, figs. 8, 8a ; pi. liv, figs. 4, 5.) 



Locality. — Renging, No. 6134 i^- ^^- Kemp). 



Shell flatly globose, flat on base, perforate; sculpture strong 

 regular striation , stronger below the suture ; colour dark ochrace- 

 ous; spire low, apex flatly convex; suture shallow; whorls 5, 

 rapidly increasing; aperture broadly lunate, subvertical; peris- 

 tome thin ; columellar margin subvertical. 



Size: major diameter I2"25, tninor ii*o, alt. axis 3'5 mm. 



There are two specimens, one in spirit with no number, which 

 I used for dissection, neither are quite mature. The species closel}' 

 resembles M. rotungensis, but the shell is not so closety wound. 



Animal (pi. liv, fig. 5) : foot indistinctly divided, lobe over 

 the mucous gland well developed : a good-sized right shell lobe 

 low down below the periphery, and a long narrow left shell lobe. 

 The animal is pale coloured with a black band from rectum on 

 edge of mantle, which gradually merges into fine black spots. I 

 was unfortunate with the genitalia, particularly as this was the 

 only specimen. The penis was broken and could not be put to- 

 gether with certainty. The amatorial organ was clearly made out, 

 also the spermatheca which is short and globose. 



