36 LAND AND FRESHWATER 



Sinistral species. 

 DiPLOMMATiNA QiBBEROsA, Godwia-Austen. (Plate LXVI. figs. 12, 

 12 «, 12 6, 12 c.) 



Diplommatina gibherosa, G.-A. P. Z. S. 1892, p. 519. 



Locality. South of the Barak River betweeu Munipur and Imphal 

 ( Godivin- Austen). 



Original description : — " Shell sinistral, ovately fusiform ; sculp- 

 ture, very distant fine costulation, 9 ribs on the antepenultimate 

 whorl when viewed from the front ; colour very pale greenish ; 

 spire low, sides rounded, apex blunt ; suture very impressed ; whorls 

 4|, very swollen, sides very convex, penultimate much the largest; 

 constriction on penultimate in centre above the aperture ; aperture 

 oval, subvertical ; peristome double, strong ; columellar tooth small, 

 internal. 



" Size : maj. diam. 1*5 ; alt. axis 2*2 mm. 



"The nearest ally of this species is B. jaintiaca, G.-A., figured in 

 the J. A. S. B. vol. xxxviii. pi. iii. ; it differs, however, much in form, 

 particularly in the expanded penultimate whorl and in its very 

 distant sculpture. A very large number of it were collected in the 

 above-named locality, and a single example at Prowi in the Lahupa 

 Naga country. 



" In the collection sent me by Mr. Aldrich in a box marked Naga 

 Hills were about 40 specimens of this shell (fig. 12 h). The exact 

 locality was not recorded, but I take it they were from some part 

 of the Anghami Naga Hills." 



Additional Notes on 

 Diplommatina nicobarica, Godwin-Austen. 



Vide Land & Freshw. Moll. Ind. pt. v. p. 185 (1886). 



This species is no. 13 of Mr. G. Nevill's Amended Hand-list 

 (p. 284) = roepstorffiana, Nevill, MS., from Katchall {de R.). 



This species in Mr. de E-oepstorff's collection bears the name of 

 D. carneola., Stol., = hattemalvensis, Nevill. In Nevill's ' Amended 

 Hand-list ' I find the title roepstorffiana entered and the typical 

 locality Katchall, with 3 specimens from Camorta and 20 from 

 Battemalve, collected bj' Ferd. Stoliczka. It is somewhat similar to 

 D. carneola from Moiilmain, but it is more elongate and the costu- 

 lation much closer and finer. 



Diplommatina nicobarica, var. battemalvensis. 



Diplommatina nicobarica, var. hattemalvensis., G. A. Nevill, MS. ; 

 P. Z. S. 1895, p. 454 ; Nevill's Hand-list, p. 284, no. 1, D. carneola, 

 var. (? distinct species), Batte Malve, coll. Dr. F. Stoliczka. 



I have discovered among some shells put up by Mr. G. Nevill 

 two specimens in a tube, labelled as above, from the island of Batte- 

 malve ; they agree in all characters with the last species, but are 

 much larger and more tumid, the antepenultimate whorl being 

 much larger than in D. nicoharica. 



Siae : maj. diam. 1-3 ; alt. axis 3-0 ; body-whorl 0-9 mm. 



