MOLIUSCA OF INDIA. 341 



not well seen, fine costiilation near sutural tube, which is rather 

 short, only 0-075 mm. long ; colour bleached ; spire conic, rather 

 high, apex blunt; suture rather shallow; whorls 4, very evenly 

 increasing, the constriction slight, short, then swelling gradually 

 towards the aperture ; aperture very oblique, ovate, straight on 

 outer margin, rounded on the columellar side, angular above ; 

 peristome double, very slightly thickened. 



Size: maj. diam. 3'4 ; alt. axis 1'4 mm. 



This is the species, No. 48 of Nevill's Hand-list, p. 294, labelled 

 by me lenticulus but never described, only one specimen collected 

 by Ferd. Stoliezka. It has been sent home from the Indian 

 Museum, Calcutta, and I am now able to figure and describe it 

 after 35 years, for which I am indebted to Dr. N. Annandale, 

 who has sent me all the undescribed species in the collection. 

 This is the specimen alluded to in the Journal of the Asiatic Society 

 of Bengal above quoted. I then wrote : " I have an Alycaus from 

 Darjiling found by Mr. F. Stoliezka, but as I possess but a single 

 much worn specimen I hesitate to describe it more fully ; it is 

 very similar to A. theohaldi, lis., from the Khtisi Hills, but is 

 smaller with a more expanded aperture ; peristome less thickened, 

 and the sculpture appears to have been very fine ; I name it 

 A. lenticulus, and trust some day to get other specimens." 



No. 49 of Nevill's Hand-list, p. 294, has also been sent (6 speci- 

 mens) from the Stoliezka collection ; they are, I consider, A. lenti- 

 culus, and three are adult shells, of which I figure one (PI. CXXXVI. 

 figs. 4-4 6), as the type specimen is certainly not fully grown. 

 This specimen is more globose, the peristome much thickened, and 

 shows fine close costulation contiguous to the sutural tube. 



This species proves to be most abundant on Rissom Peak, in the 

 Western Bhutan Hills (No. 2552, B.M. Coll.). 



Alxc^us montanus, G. Nevill. (Plate CXXXVI. figs. 3, 3 a of 

 type.) 



Journal Asiat. Soc. Bengal, vol. 1, pt. 2, 1881, p. 149, pi. vi. 

 fig. 5. 



No. 50, Nevill's Hand-list, p. 294. 



1. Sikhim, 11,000 ft., ex coll. Dr. F. Stoliezka. 



0)'iginal deso'iption : — " Openly and widely umbilicate, much 

 depressed, solid, bright corneous brown, closely, evenly, and 

 regularly ribbed, ribs somewhat superficial, scarcely flexiious, close 

 set, for a short distance at the sutural tube more crowded and 

 more strongly developed ; spire scarcely elevate, apex obtuse ; 

 whorls 4, regularly evenly rounded, constriction scarcely defined, 

 sutural tube short (about 1 mm.) ; aperture circular, peristome 

 slightly thickened, but not double ; operculum thick, black, and 

 concave. 



" Bab. Sikhim, at 11,000 feet. 



" Diam. 5:^, alt. 3jL mm. 



