COXCnOLOGY. 1C5 



Leptopoma, r/eiffrr. 



These are small light thin sIk^Hs, the imimals being of arboreal habits, bnt with 

 no very marked characters. 



,, ASPiRANS, B. Pegu and Tenasserim. 



,, KoiiPsTORFFiAXi-.M, 0. Xev. Andamaus. 



Dkrmatocera, H. and A. Adams. 



This genus is distingnished by carrying an erect horn on the extremity of the 

 foot. One species is reiferrcd to it by INevill with doubt 



,, iJtMAcrLATUM, Chom. Nicobars. Ivatcliall. 



Pteeocyclos, Benson. 



Operculum horny, multisjiiral, concave within, lamellated without. Shell de- 

 pressed, widely umbilicatod. A wing-like dilatation of the peristome at the suture. 



ATEE, Stol. Ataran Valley. 



Aeakanensis, W. ]!I. Tonnghup, Arakan. 



CETEA, B. • Phaiethau Hill, Tenasserim. 



Feddeni, W. B1. Pegu. 



iNSiGNis, Theob. Upper Salwcen Valley. 



PARVUS, Pearson. Sandoway. 



PULLATus, B. Pegu. 



Rii 



OST05IA, Benson. 



Last whorl free towards the mouth, with a straight porrect tube in place of the 

 ■wing of Pterocychs, and a deeply cupped shelly operculum, the cou\-oxity external. 



,, HiUGHTONi, Benson. Maulmain. 



SpiEAcniTM, Benson. 



A sutural tube in addition to the wing (of Pferoctjclos). Operculum shellj', flat 

 or convex (cupped). 



,, AvAxcir, W. Bl. Ava and Pegu. 



,, AxDERsoxr, W. Bl. Bhamo. 



,, Bhamoexse, Theob. Bhamo. 



,, BiTFBiFERUir, Tlicob. Bluimo. 



,, (opisTnopoRus) GoEDONi, B. Maulmain. Toung-ngoo. 

 Jeedoxia, W. Blanford. 



Operculum multispiral of two lamina;, the inner horny, the outer shelly. Shell 

 email, turbinate. 



,, Phatrei, Theob. Upper Salween Valley. 



Cychjphorus hiiiratus, Beddome {fide Hanley). 



PUPININ^. 



Shell turrited, more or less tumid. 



Mecu-ojiastoma, Guilding. 



Operculum thin, horny, multispiral. 



,, secthabee, Gould. Yanglaw. Tenasserim. 



BnAPnAUurs, Pfeijfer. 



Operculum thin, horny, multispiral. Shell thin, rugose. Mouth circular, with 

 expanded peristome, and a short tube adnate to the peristome. Tentacles long. 



,, cuRYSALis, Pfr. Farm Caves, Maulmain. 



In this species the peristoraial tube lies in the same plane with the peristome. 



PACHTsiPHON, Theob. et Stol. Kwengan. 



In this species'the peristomial tube is bent back bchiml the peristome. 



