SIT ALA. 231 



The small projecting point of the reflected columellar margin of 

 the peristome tends to recall that in Microcystina. 



b. Columella strongly reflected, thickened, and twisted. 



344. Sitala? gratulator, Blf. (Nanina) J. A. S. B. 1865, 2, p. 72 ; 



Pfr. (Helix) Mon. Hel v, 1868, p. 94 ; H. $ T. (Helix) C. I. 

 1876, pi. 16, fig. 2: Nevill, Nanina (Sitala), Hand-l. i, 1878, 

 p. 33 ; Godwin-Austen. Mol. Ind. i, 1882, p. 42, pi. 10, figs. 1, 1 a, 

 Id (shell). 



Shell perforate, trochiforin, not very thin, obliquely striated and 

 ornamented with strong spiral (longitudinal) raised lines above 

 and more finely concentrically lined and radiately striate beneath, 

 pale brownish horny; about 6 or 7 ribs on last whorl; spire 

 conical, apex obtuse, suture impressed; whorls 5|, slowly and 

 regularly increasing, convex, the last carinate at the periphery, 

 flatly convex beneath ; aperture diagonal, subtrapezoidal, breadth 

 exceeding height ; peristome thin, margins united by a callus, basal 

 sinuate, columellar forming a right angle with basal, reflected and 

 thickened above and passing half round the perforation. 



Major diam. 5, min. 4'5, height 4 mm. 



Hob. Irrawady Valley, Pegu. Common about Thayet Myo, also 

 at Akouktoung and Henzada. 



The animal has a small mucous pore at the posterior end of the 

 foot, and a small lobe overhanging the mucous pore. The eye- 

 tentacles are long. These characters agree with those of S. infula. 

 The very oblique mouth and twisted columella, however, may point 

 to generic differences. 



B. Small shells of doubtful affinity, all under 6 mm. in diameter. 

 a. Carinate, subperforate or narrowly perforate. 



345. Sitala gromatica, Godwin-Austen, Mol. Ind. i, 1882, p. 32, pi. 10, 



fig. 5 (shell). 



Shell subperforate, pyramidal, trochiforin, obliquely striated and 

 spirally ribbed, with about 10 fine, thread-like, subdistant raised 

 lines, closer together below near the suture, umber-brown ; spire 

 conical, sides nearly flat, suture shallow ; whorls 7, convex, the 

 last carinate at periphery, lower surface slightly convex, radiately 

 and concentrically striated; aperture oblique, subquadrately lunate; 

 peristome thin, columellar margin oblique, reflected. 



Major diam. 3J, height 3 mm. 



Hab. Manipur, North Cachar, and Khasi Hills. 



346. Sitala haroldi, Godwin-Austen, Mol. Ind. i, 1882, p. 33, pi. 10, 



fig. 7 (shell) ; id. t. c. ii, 1898, p. 47 ; id. P. Z. S. 1895, p. 448. 



Shell subperforate, trochiform, finely spirally lirate, about 10 

 spiral lines on the lower whorls, radiately and concentrically striate 

 on the base, brownish horny ; spire conical, sides flat, suture 



