CEYPTACrSTENIA. 187 



284, Cryptaiistenia globosa, Godwin-Austen, Helix (Nanina), J. A. 



S. B. lf^76, 2, p. 312 ; id. (Austenia) Mol Ind. i, p. 153, pi. 37, 

 figs. 5-6 i (shell). 



Shell depressedly subglobose, thin, transparent glossy, scarcely 

 striated, ^^■hitish horny ; spire slightly raised, suture impressed ; 

 whorls 34, convex, the last not descending above, broadly rounded 

 at periphery, expanded below ; aperture oblique, lunately circular; 

 margins converging, columellar roundly sinuate. 



Major diam. 9-i-, min. 1^, height S^ mm. 



Hah. Summit of Toruputu Peak, Dafla Hills, north of Assam 

 {^Godwin-Austen^. 



More globose and with a rounder mouth than the allied forms. 

 Animal dark grey, with the lobe over the gland much hooked. 



b. Species from Bengal. 



285. Cryptaiistenia bensoni, Pfr. (Vitrina) P. Z. S. 1848, p. 107 ; id. 



(Vitrina) Mon. Mel. ii, 1848, p. 497 ; H. ^- T. (Vitrina) C. I. 

 1876, pi. 65, figs. '1-4 ; Godwin- Ausf en (Austenia), Mol. Ind. '\, 

 1883, p. 150, pi. 36, figs. 6, 7 (shell and animal extended). 

 Austenia bensoni, var. sylhetensis, Godwin- Austen, I. c. pi. 38, fig. 3. 



Shell depressed, thin, faintly striated, polished, translucent, 

 pale horny ; spire scarcely raised, obtuse, suture very slightly 

 impressed ; whorls 3|, slightly convex, the last scarcely depressed; 

 aperture oblique, lunately subovate ; peristome simple, thin, the 

 margins converging, the upper slightly curved forward, the 

 columellar sharply curved upwards, inclined forward beyond the 

 vertical. 



Major diam. 10, min. S, depth oh mm. (The original type 

 measured 12 x 9| x 6 mm.) 



Hah. Bengal, Calcutta, Jessore, Chandanagore. Not rare in 

 the Botanic Garden, Calcutta. 



Animal dull greenish grey or very pale olive with some large 

 irregular blotches ; sole of foot white in the middle, dusky on 

 each side. The shell-lobes of the mantle almost or entirely cover 

 the shell and are rough, being covered with small papillae. The 

 teeth on the radula are : 45 . 3 . 12 . 1 . 12 . 3 . 45 (60 . 1 . GO) ; all 

 the 15 inner laterals are tricuspid, the outer bicuspid and pointed, 

 the second outer cusp not being near the end. 



Godwin-Austen has described as a variety C. bensoni, var. stjl- 

 hetensis, from a wood on the banks of the Soorma River in Sylhet, 

 between Atgaon and Chatak. Although the shell does not differ 

 greatly, the radula has 04 . 2 . 14 . 1 . 14 . 2 . 64 (80 . 1 . 80) teeth, 

 the outermost of which show signs of pectination, as in DurgeUa. 

 The animal is light yellowish green and creeps about with the 

 caudal termination of the foot raised in the air. 



