APPENDIX. 301 



it was placed in Vitrina. For the present, and until more is 

 known of the Khasi Hill species, it is safer to place it in the 

 genus Cryptaustenia, after No. 286, p. 188. 



I cannot believe these tropical forms are related to, or that 

 their anatomy is comparable with, that of the Palsearctic genus 

 Vitrina, on the ground of a single character, viz. a pointed foot. 



William Theobald (J. A: S. B. 1870, p. 401) describes a Vitrina 

 ataranensis from the river of that name in Martaban and which 

 Nevill placed, I think rightly as far as the knowledge we possess, 

 in the genus Vitrinopsis of Semper, Hand-1. i, p. 17. I have a 

 single specimen of this species received from Theobald, of which I 

 have made a drawing. It has a long very pointed foot, and 

 apparently no mucous gland ; but as in some of these forms the 

 foot tapers to an overhanging lobe, very much concealing the slit 

 of the mucous gland below, it is very difficult in a badly-preserved 

 hardened spirit-specimen to tell whether a mucous pore is present 

 or not : ataranensis has ample right and left shell-lobes. This 

 being the only specimen known, except the single one in the 

 Calcutta Museum, I have not attempted to cut it up.] 



APPENDIX. 



To follow No. 286, p. 188 : 



286 a. Cryptaustenia? papillaspira, Godwin-Austen (Austenia), Mol. 

 Ind. i, p. 153, pi. 37, figs. 4-4 b (1883) ; G. Tapp. Canefri 

 (Helical-ion), Ann. Mus. Civ. Gen. xxvii, p. 316 (1889). 



Shell depressedly subglobose, very thin, transparent, smooth, 

 polished, light horny ; spire scarcely raised, but apex prominent, 

 nipple-shaped, suture slightly impressed; whorls 3, convex; 

 aperture oblique, lunately oval, margins converging, upper arcuate, 

 columellar broadly sinuate. 



Major diam. 10|, min. 8, height 5| mm. 



Hab. North Khasi Hills (Godwin- Austen} ; Bhamo (Fea). 



This differs from allied forms in the raised prominent apex. 



According to Signor Canefri, this has no mucous pore, but the 

 tail ends in a point. The animal jumps about when disturbed, as 

 salius does. 



*286 6. Cryptaustenia? canefrii. 



Vitrina birmanica, Tapparone Canefri, Ann. Mus. Civ. Gen. xxvii, 

 p. 316 (1889), nee Philippi. 



" Shell imperforate, globose, thin, pellucid, very polished, pale 

 amber ; apex slightly exserted, obtuse ; whorls 4, irregularly 



