182 ZONIXIDJE. 



the periphery, convex beneath ; aperture oblique, ovately lunate,, 

 margins converging, the upper curved forward, columellar deeply 

 sinuate. 



Major diam. 14, min. 11, height 6 mm. A large variety 

 measures 19| x 15| x 8 mm. 



Hah. Sikhim at low elevations, Pankabari, Eangun Yalley, 

 Nampok, Eangpo near Tumlung ; Damsang Peak, Daliug District, 

 Bhutan. 



A drawing of the animal by Stoliczka is published in Godwin- 

 Austen's ' Mollusca of India,' and shows that the resemblance to 

 C. he?isoni is very great. There are the same broad shell-lobes, 

 strongly papillose, covering the greater part of the shell. The 

 foot has a linear gland behind with a slight overhanging lobe, and 

 the sole is divided into a central area with two lateral margins. 

 The teeth of the radula are thus arranged: 50 . 1 . 14 . 1 . 14 . 1 . 50 

 (65 . 1 . 65), and resemble those of MacroMamys indica. 



The animal in most of its characters clearly resembles Eury- 

 cJdamys pJatycMamys, and is accordingly placed in the genus 

 Eurychlamys by Godwin-Austen. The shell, however, differs con- 

 siderably. The present form has a dart-sac, which E. platychlamys 

 wants ; but this may not be a very important difference. 



278. Cryptaustenia ovata, H. Blf. (Helicarion) J. A. S. B 1871, 2, 

 p. 44, pi. 2, fig. 9 ; Pfr. (Vitrina) Mon. Hel. vii, p. 10; Godwin- 

 Austen (HeUcarion), J. A. S. B. 1876, 2, p. 312 ; Nevill (Heli- 

 carion), Hand-l. i, 1878, p. 14. 



Shell depressed with an ovate periphery, diaphanous, dark 

 horny, smooth, polished ; spire almost flat, apex scarcely exserted, 

 suture impressed ; whorls 34, rapidly increasing, the last slighth' 

 descending; aperture oblique, ovately lunate, margins converging ; 

 upper margin of peristome arcuate, columellar regularly sinuate, 

 snbvertical. 



Major diam. 11*5, min. 9, alt. 5 mm. Another specimen 

 measures 135 x 10 x 6 mm. 



Hah. JSTear Darjiling (Stoliczlrt). Other localities in Bengal, 

 mentioned by Nevill in his ' Hand-list,' are, as Godwin-Austen 

 has shown, very probably due to this shell being confounded with 

 A. j^anchefensis. 



" Distinguished from H. salius, Bs. sp. (with which it is asso- 

 ciated), by its larger size, more depressed form, and simple peristome, 

 not recurved at the columella. On the other hand, it is smaller, 

 more solid, and more globular than H. pJanospira, Bs. sp. Prom 

 H. scutella, Bs. sp., and JI. hensoni, Pfr. sp., it differs by its 

 greater solidity, its highly polished surface, and the less rapid 

 increase of the last whorl. It is also smaller than the former of 

 these species." 



It is far from improbable that this shell also belongs to the 

 genus Dnrgelhi. 



