RAHULA. 251 



The shell from Dainsang (fig. 82, D & E), which I consider corys, 

 differs considerably in other characters from macropleuris. In 

 this last the spire is pyramidal, with flat sides, as in pi. 103, 

 fig. 1, Mol. Ind.'ii. ; in corys (fig. 82, D & E) the spire contracts 

 more rapidly above the antepenultimate whorl, and the sides 

 are decidedly concave. The distant costulation is stronger ; the 

 base is flatter ; the coluinellar margin broader ; the aperture is 

 quadrate and smaller; while the umbilicus is also smaller (vide 

 Benson's description, below).] 



[382. Rahula corys, Bs. 



Helix corys, Bs. A. M. N, H. iii, 1859, p. 265. 

 Kaliella (sec. B) corys, Theob. Suppl. Cat. p. 20. 

 Rahula corys, Godwin- Austen, Mol. Ind. ii, 1907, p. 218, fig. 1 

 (type), fig. 4 (shell). 



Original description : " Testa perforata, elongato-pyramidali, 

 oblique conffrtim minutissime costulato-striata, albida, non nitente ; 

 spira anguste pyramidali, apice obtusiusculo, sutura impressa ; an- 

 fractibus 5|, conveviusculis, ultimo ad peripheriamfiloso-carinato, basi 

 planiuscula ; apertura obliqua ?, quadrata, longitudine latitudinem 

 wquante, peristomate tenui, recto, moraine columellari verticali, longe 

 vix expansiusculo. 



" Diam. 2, long. 3 mill. 



" Habitat in valle Eungun [Eungnu], prope Darjiling, rarissime 

 occurrens. 



" A single dead specimen occurred to Mr. W. T. Blanford. 

 This minute shell is of a type allied to the last-described species 

 in form, but is very differently sculptured. Its more pointed, 

 not papillate apex, and the absence of costulation at somewhat 

 remote intervals, and of a marginate suture, through so many 

 whorls, prove that it is not the young of macropleuris. From the 

 clear horn-coloured Helix fastigiata, Hutton, of the Western 

 Himalaya, it may be known by its narrower spire, decided sculp- 

 ture, minute size, the absence of a marginate suture, and by its 

 perforate base ; and from the dark-coloured H. barraJcporensis, Pfr., 

 of the Sikkim Terai, by the first three characters."] 



383. Rahula bascauda, J3s. (Helix) A. M. N. H. (3) iii. 1859, p. 186 ; 

 Pfr. (Helix) Mon. Hel. v, 1868, p. 256; H. $ T. (Helix) C. 1. 

 1876, pi. 16, tig. 1 ; Nevill (Nanina ?), Hand-l i, 1878, p. 42 ; 

 [Godwin- Austen, Mol. Ind. ii, 1907, p. 218, pi. 117, figs. 1, 

 la, 3, 3 a (shells).] 



Shell very deeply umbilicated, subtrochiformly conoid, orna- 

 mented with oblique rather distant raised ribs above, less raised, 

 closer and flexuous below, rufous horny ; spire conical, apex 

 obtuse, suture well impressed ; whorls 6|, convex, slowing increas- 

 ing, the last not descending with a raised keel at the periphery, 

 convex beneath, subangulate around the umbilicus ; aparture 



