360 Records of the Indian Museum. [Voi,. VIII; 



HELICARIONINAE. 



Cryptaustenia. 



Austenia {A. rotungensis, n. sp.). 



Girasia. 



DURGELLINAE. 



Durgella. 



HELICIDAE. 



Sivella (sp. nov.). 



Planispira {P. delibrata var. fasciata, G.-A.) 



Plectopylis (sp. nov.). 



Plectotropis. 



Amphidromus. 



Opeas. 



Glessula. 



Clausilia (sp. nov.). 



Austenia rotungensis, sp. nov. 



(PI. xxiii, figs. 1-5 ; pi. xxiv, figs. 1-5). 



Rotung, Abor HilLs, 2a-xii-ii fS. IV. Kemp). 3 specimens. 

 Nos. 5693-4. and 5881. 



The largest specimen (5881) measures 70 mm., the one dis- 

 sected (5963) 60 mm., and both are very much contracted in the 

 spirit ; it must be quite too mm. when living. 



Animal, as in spirit, ash-grey with a rufous tinge, darker 

 about the head, palest on the mantle lobes. There are signs of a 

 few distinct dark spots on the side of the foot. Sole of foot has a 

 distinct central area, crossed by distinct V-shaped lines. Right 

 and left shell lobes are united above the respiratory orifice and a 

 short indistinct cicatrix can be seen where the junction takes place. 

 The left dorsal lobe is large and expanded forwards in front over 

 the neck, the right is small, lying between the above orifice and 

 the hinder part of the shell. All the lobes are smooth. Foot be- 

 hind is as long as the shell, as contracted, it is much compressed 

 on the side, very sharply keeled, terminating in a vertical, linear 

 mucous pore, and having no lobe over it, there is a slight turning 

 over above the nearly vertical slit (pi. xxiii, fig. 5). 



The peripodial margin is well marked by being much paler 

 than the part above, and is closeh' streaked with fine lines. The 

 surface of the body is very rough, in the largest the rows of tubercles 

 being conspicuous, in the specimen dissected it was less so, due 

 probably to the different action of the spirit. The usual parallel 

 grooves are not conspicuous, but there is a line of oblong tubercles 

 which can be followed to the extremity of the foot, better to be 

 understood in the drawing than it can be described, as well as the 

 margin of the mucous gland. In these details of structure it differs 

 considerably from its nearest known alh^ A. resplendens , Nevill, of 

 Upper Burma ; in resplendens the peripodial grooves hardly show 

 at all, vide Moll. India, vol. ii, p. 287. The eye tentacles are very 



