1S60.] Contributions to Indian Malacology. 125 



terpart of that in the Sikkim shell, Megalomastoma funiculatum, B. 

 The perfect smoothness of Dip. Nilgirica, and the continuity of the 

 internal peristome, give it a sub-generic character, yet seem insuffi- 

 cient alone to authorize its separation from Liplommatina. 



The animal could not be well observed for the want of a suffi- 

 ciently powerful magnifier at hand. It was small, short, and colour- 

 less, with two small black tentacles. 



4. — Cyclottts Malabauictjs, n. s. 

 Testa subaperte umbilicata, depresso-couica, albida, glabra, nitidula, 

 epidermide decidua cornea, ad anfr. ultimum transverse fusco-strigata, 

 induta ; spira conica, apice acuta ; sutura profunda; anfr. 4 rotundati, 

 celeriter crescentes, ultimus cylindraceus ; apertura parum obliqua, 

 circularis, prope umbilicum parum sinuata, superne vix angulata ; 

 perist. duplex, externum brevissime expansum, internum porrectum, 

 aeutum, continuum ; umbilicus perspectivus. Operculum baud immer- 

 surn, duplex, internum corneum multispirum, externum testaceum, 

 anfractuum marginibus lamella spirali, albida, scabra ad anfr. exter- 

 nos perelevata. et versus centrum incurvata, quasi convexa, rnunitis. 



Diam. maj., 8 J m. m. 



Ditto rnin., , 2f ditto. 



Alt., 2| ditto. 



Apert. diam., 1^. ditto. 



Hab. sub rupibus et saxis in terra humida ad margines sylvarum 

 prope Pykara montium "Nilgiri," ad alt. 7000 ped. 



Nearly allied to Cyclotus filocinctus^ Benson, by the peculiarity of 

 its operculum, this shell is distinguished by its smaller size, more 

 depressed form, and less expanded peristome, by the absence of the 

 marked sculpture of C.filocinctus, and by the epidermis being lighter 

 in colour and marked by brown transverse streaks on the last whorl. 

 That of C. filocinctus is hispid. The last named shell was first 

 described by Mr. Benson as a Cyclostoma, to which genus it was 

 assigned till lately. The construction of the operculum is very 

 peculiar. The testaceous spiral lamina being very much more raised 

 towards the exterior than towards the centre, and being curved 

 inwards, the interior whorls of the operculum are almost concealed 

 and the appearance, unless very closely examined, is that of the oper- 



s 



