PSEUDAUSTEXIA. CRYPTOSOMA. 209 



(2 inches) ; the hinder part of the foot long and narrow, with a 

 small mucous pore overhung by a small lobe. The foot is distinctly 

 divided into three longitudinally. Kadula 24 . 1 . 19 . 1 . 19 . 1 . 24 

 {44 . 1 . 44). 



313. Pseudanstenia auriformis, Elf. (Vitrina) J. A. S. B. 1866, 2, 

 p. 36; Pfr. (Vitrina) Mon. Hel v, 1868, p. 15 ; Nevill (Helicarion), 

 Hand-l. i, 1878, p. 16 ; Godwin-Austen (Africarion), Mol. 2nd. i, 

 1888, p. 245, pi. 57, fig. 7 (shell). 



Shell very depressed, oblong-ovate, very thin, smooth, convex 

 without, with a greenish membranaceous epidermis, which pro- 

 jects beyond the peristome, nucleus paler ; spire flat, about 1J 



Fig. 73. Pseudaustenia auriformis. 



whorls. Aperture occupying the whole lower surface of the shell 

 and exposing the interior to the apex. 



Length 13, breadth 8, height 2| mm. 



Hob. Sispara Ghat, Nilgiri Hills. 



Animal not known. The shell differs from that of P. atra by 

 being more oblong and less elliptical, and by the smaller apex, 

 the outline of which projects beyond the margin of the peristome. 



Genus CRYPTOSOMA. 



Cryptosoma, Theobald, J. A. S. B. xxvi, 1857, p. 252 ; Godwin- 

 Austen, Mol. Ind. i, 1888, p. 14, pi. 4 (animal, shell, and details of 

 anatomy) ; ii, 1898, p. 50 (anatomy). 



Type, C. prcestans, Gould. 



Range. Burma, Siam, and Southern China to Hong-Kong. 



Shell imperforate and with few whorls, like that of Vitrinp., 

 and only differing from Helicarion in being thicker, in the last 

 whorl descending, and especially in having a stronger peristome, 

 which, in the dry season, is furnished with an epiphragm. 



Animal retractile within the shell. The lobes of the mantle 

 are small as compared with those of Cryptaustenia, and cover a small 

 part of the shell ; right and left shell-lobes united at the back of the 

 shell. A large gland at the posterior termination of the foot without 

 any overhanging lobe. Peripodial groove well developed ; sole of 

 foot in three longitudinal divisions. Generative organs much as 

 in Austenia ; arnatorial organ very large, spermatheca cylindrical. 

 Odontophore with much more numerous lateral teeth than in Indian 



