-M.VCROCHLAMYS. PAEVATELLA. 145 



F. Species from Andaman and other Islands in Bay of 



Bengal, 

 a. Depressed choinix. 



pseudochoinix. 



exid. 



stephus. 



rooodmasoni. 

 h. Depressedly conoid, more or less lenticular .... aulopis. 



pseudatdopis. 



fordiana. 



perinconspicua. 



battinialvensis. 



G. Species from Indian Peninsula and Ceylon. 



a. Subglobosely depressed or subturbinate. 



a'. Longitudinal sculpture present (microscopical), tenuicula. 

 1). No longitudinal sculpture frayilis. 



lixa. 



hebescens. 



2)edina. 



infausta. 



b. Depressed or conoidly depressed. 



a. Diameter not exceeding about 15 mm umbrina. 



nepas. 



xooodiana. 



rutila. 



vallicola. 



todarwm. 



perrotteti, 



pra va. 



vilipensa, 



c. Upper surface transversely plicate or ribbed .... perinytmdensis. 



d. Shells not exceeding about 6 mm. (^ inch) in 



diameter. 

 a. Depressed or conoidly depressed. 



b. Smooth perfucata. 



tratanensis. 

 b' . Longitudinally striated kandiensis. 



neherensis. 



atomaJ\ 



GreniTs PARVATELLA, nor. 



Type, P. fiemingi, Pfr. 



Range. AVesteru Himalayas of Kashmir. 



Shell imperforate and with few whorls, rapidly increasing, as in 

 Vitrina. Mouth very oblique and large. Usually a thick oliva- 

 ceous epidermis. 



Animal with elongate tongue-shaped shell-lobes, broader than 

 in Macrochlamgs, and a pointed lobe above the large mucous poi'e 

 at the posterior termination of the foot. The male organ has a 

 peculiar disii-like coil, as in Oxgtes orobia and in typical forms of 

 Macrochlamgs, to which the retractor muscle is attached. 



This genus has the animal of Macrochlamys, with a Vitrina-\\^e 

 shell. 



