1S65.] Contributions to Indian Malacology. 87 



a somewhat flatter spire, measures only 5 to 5J millem. in its largest 

 diameter, and may be a distinct shell. It, also, is from the Arakan 

 hills. 



Nanina honeslia, Gould, originally described from Tavoy, is found 

 throughout western Pegu and Arakan, as well as at Molmein, where 

 it was collected by Mr. Theobald. Dr. Gould's description is very 

 imperfect ; he does not even note the great obliquity of the mouth, 

 which is the most striking character of the species. In the Arakan 

 hills near Prome, and about Thayet Myo, a larger variety occurs, in 

 which the angulation of the periphery entirely disappears in the adult, 

 although the other characters are the same. The sutural margination 

 is sometimes, though rarely, obsolete. Large specimens measure 14 

 by 11J millem., and about 7 in height. 



N. levicula, Bens., also first found by Mr. Theobald in the Tenas- 

 serim provinces, is very common about Thayet Myo, Prome, and 

 Akoutoung, and occurs also as far south as the Bassein district. It is 

 frequently whitish in colour. It is allied to N. honesta, but easily 

 distinguished, besides by its smaller size, by the fewer whorls and their 

 more rapid rate of increase, and also by the total absence of sculpture. 

 There is much variation in size : my largest specimen measures 8 J and 

 7 millem. in its two diameters. The animal has a very small lobe 

 above the mucus pore in the tail, which is truncated. The mantle is 

 rather large. A single specimen of a shell, apparently identical, was 

 found by me, some years ago, near Balasore in Orissa. 



N. textrina was evidently described by Mr. Benson, (in the Annals 

 and Mag. Nat. Hist. 1856, Ser. 2, Vol. XVIII. p. 252,) from an 

 immature specimen. When adult, the peristome is white and slightly 

 thickened within, and the body whorl internally of a milky white 

 colour. This handsome species is found west of the Irawady, from 

 Thayet Myo to Bassein, and varies considerably in size, in the height 

 of the spire, and in the degree of angulation above the periphery. 

 The greatest change takes place in the latter character ; specimens 

 from the district of Bassein being sharply angled, and even subcarinate, 

 the angulation diminishing, however, close to the aperture ; while, in 

 specimens from Thayet Myo and Prome, the periphery is round. In 

 height of spire, the shell varies from depressed to subturbinate ; in 

 two specimens before me, one has a major diameter of 30 millem., and 

 height of 13 ; the other with a major diameter of only 27, measures 



