138 GASTBOCOPTA, INDIA, ETC. 



lamella is strongly bifid in a front view. Though both lamellae 

 are completely concreseent, the parietal stands obliquely to 

 the angular, and there is a depression or saddle where they 

 meet. The angular extends to the lip. There is a very low 

 infraparietal in some examples, but not in that figured. The 

 columellar lamella is stout and horizontal, deeply entering, 

 The basal fold is subcolumellar in position, a low, broad 

 nodule, but sometimes higher than in the individual figured. 

 The lower palatal plica is compressed, the upper wide and 

 blunt. Length 1.9, diam. above aperture 1.1 mm. ; 5 whorls. 



83. GASTROCOPTA (?) THIBETICA (Benson). 



Shell riniate-subperforate, oblong-ovate, smooth, translu- 

 cent, glossy; spire ovate, apex obtuse, suture impressed. 

 Whorls 5, subconvex, the last ascending in front. Aperture 

 obovate, 6-plicate : one angular fold on the parietal wall, fol- 

 lowed by a deeply placed inferior one ; two columellar teeth 

 and two deeply placed palatals. Peristome thin, a little ex- 

 panded, the columellar margin reflected a little. Length 2> 

 diam. 1 mm. (Benson). 



Thibet: Iskardo (Dr. Thomson). 



Pupa thibetica BENS., Ann. Mag. N. H. (3), xiii, 1864, p. 

 138. 



"Nearly allied to P. huttoniana Bens., to which I erron- 

 eously referred it originally ; but on close examination perfect 

 specimens exhibit two parietal plaits, one of which is remotely 

 seated, and in some positions is not easily detected" (Ben- 

 son). This species has not been figured. G. huttoniana some- 

 times has a low, nodular, infraparietal lamella. 



84. GASTROCOPTA AVANICA (Benson). PI. 29, fig. 9; pi. 26 r 

 fig. 11. 



Shell umbilicate, ovate-oblong, subcylindrical, scarcely stri- 

 atulate, glossy, brownish-corneous, translucent. Spire oblong, 

 conical towards the obtuse apex; the suture deeply impressed. 

 Whorls f) 1 /^, subconvex, the last ascending in front. Aperture 

 ovate, obtuse above, 6-toothed : one entering, duplicate pari- 

 etal fold ; two deeply placed columellar teeth, and three 

 deeply placed palatals. Peristome expanded throughout, the 



