1869.] Contributions to Indian Malacology. 139 



species described by Chemnitz may prove to be Indian. Two other 

 shells attributed by Chemnitz to the Nicobar Islands, Helix hcemas- 

 toma, L., and H. Nicobarica, Chem., have not since been brought thence. 

 It is just possible that the former may occur, though I cannot help 

 thinking it improbable, but as the locality for Helix Nicobarica is 

 now distinctly ascertained to be the neighbourhood of Cuddapah, far 

 inland and amidst a fauna and flora which resembles that of the Cape 

 of Grood Hope nearly as much as it does that of the Nicobar Islands, 

 I utterly disbelieve in the occurrence of the species in the latter 

 locality. The fact that both Helix Nicobarica and H. hcemastoma 

 are Indian or Ceylonese, tends to increase the probability of Cataulus 

 tortuosus being also an Indian shell. 



9 — Opisthostoma maerostoma, Beddome, MS. 

 PI. XVI, fig. 7. 



Testa perforata, conoideo-ovata, albida vel pallide rubella, sub- 

 distanter oblique filiformi-costulata, sub lente spiraliter minutissime 

 et confertissime striata. Spira elevato-conoidea, lateribus convexis ; 

 apice acutiusculo ; sutura valde impress®. Anfr. 5 J, convexi, apicales 

 normales non-diviantes, penultimus vix major, ultimus confertius 

 costulatus, brevissime constrictus, antice sigmoideo-deflexus. Umbili- 

 cus ab anf radio ultimo non-occultus. Apertura retrorsa sub-rotunda, 

 fere verticalis ; peristoma brevissime ad anfractos duos, penultimum 

 et ante-penultimnm, adnatum, duplex, internum continuum expansius- 

 culum, externum, expansum breviter interruptum. Long. 3, diam. 

 major 3, min. 2 millem. Ap. diam. cum perist. 1£ millem. 



Hah. In montibus Bramagiri dictis, in reqione Wynaad, Jiaud 

 procul a littore Malabarica India. H. Beddome detexit. 



Shell perforated, conoidly ovate, white or pale reddish in colour 

 with sub-distant oblique filiform costulation, which becomes closer 

 on the last whorl : beneath a microscope there is very fine close spiral 

 striation, very difficult to detect in general, as in other species of 

 Opisthostoma and many Diplommatince* Spire elongately conoid 

 with convex sides, the apex rather acute, suture deep. Whorls 5J 

 convex, the apical ones not excentric as in the other Indian species ; 

 the penultimate whorl very little larger than those above it. The 

 last whorl is constricted as usual. In front of the constriction it is 

 * In a good light it may easily de detected in 0. Crespigni, H, Ad, 



