SITALA. 229 



It is also curious to find that this radula is almost the counter- 

 part of Sitala attegia, as described by Stoliczka (vide J. A. S. B. 

 vol. xl, 1871, pt. 2, p. 238), but Stoliczkas figures of the teeth of 

 this genus are very misleading.] 



339. Sitala culmen, mf. (Nanina) J. A. S. B. 1865, 2, p. 72 ; Pfr. 

 (Helix) Mon. Hel v, 1868, p. 94 : Godwin- Austen, Mol. 2nd. i r 

 1882, p. 31, pi. 8, fig. 4 (shell). 



Shell very minutely perforate, trochiform, thin, pale brownish 

 horny, translucent, obliquely striated, and with fine raised, rather 

 distant, spiral lines, closer together near the base of each whorl ; 

 8 or 9 may be counted on the lower whorls, some stronger than 

 others ; spire conical, apex obtuse, suture impressed ; whorls 6, 

 convex, the last sharply keeled at the periphery, slightly convex 

 beneath, marked with radiating striae and fine concentric impressed 

 lines ; aperture slightly oblique, subquadrately lunate ; peristome 

 simple, thin, columellar margin vertical, triangularly reflected. 



Major diam. 5|, min. 5^, height 5| mm. 



Hob. Pegu, Akouktoung on Irrawady Kiver, and banks of 

 Hsanda Hyoung, west of Henzada. 



Stoliczka referred this shell to S. attegia, and Nevill to S. infula. 

 It is distinguished, however, both by smaller size, higher spire, 

 and stronger sculpture. 



340. Sitala confmis, Blf. (Nanina) J. A. 8. B. 1865, 2, p. 71; Pfr. 



(Helix) Mon. Hel. v, 1868, p. 83 ; H. fy T. (Helix) C. I. 1876, 

 pi. 159, fig. 8 ; Godwin- Austen, Mol. 2nd. i, 1882, p. 32, pi. 10, 

 fig. 2 (shell). 



Shell narrowly perforate, subtrochiform, thin, marked with 3 to 

 4 distant spiral ribs on each whorl, and obliquely striated, whitish 

 horny ; spire conical, with the sides flat, apex slightly obtuse, 

 suture impressed. Whorls 7-7j, the upper slightly convex, the 

 lower nearly flat, last whorl sharply keeled, convex beneath, and 

 finely radiately striated ; aperture slightly oblique, subquadrately 

 lunate : peristome thin, straight, columellar margin subvertical, 

 triangularly reflexed. 



Major diain. 10 j, min. 9|, height 9 mm. 



Hob. Thayet Myo and Ava ; Burma. 



From infula, attegia, and culmen this species is distinguished by 

 stronger sculpture, and from arx by the sides of the spire being 

 straight, not concave. 



341. Sitala arx, Bs. (Helix) A. M. N. H. (3) iii, 1859, p. 184 ; Theob. 



(Helix) J.A.S.B. 1857, p. 250; Pfr. (Helix) Mon. Hel. v, 

 1868, p. 90 ; H. $ T. (Helix) C. I. 1876, pi. 54, fig. 8. 



Shell narrowly perforate, conical, thin, faintly obliquely striated, 

 and each whorl surrounded by about 4 strong, raised, thread-like 

 ribs, smooth beneath, translucent, pale brownish horny ; spire 

 conoidal, the sides considerably concave, suture scarcely impressed, 



