88 Contributions to Indian Malacology. [No. 2, 



15 millem. in the axis, and this variation is seen in both rounded and 

 subcarinate specimens. The largest specimen I possess, measures in 

 its two diameters, 36 and 31 millemetres, and in height 18. 



N. pansa, Bens., was found near Akoutoung and Thayet Myo ; and 

 also, more abundantly, in the neighbourhood of Ava. 



N. (Trbchomorpha) attegia, Bens., abounds at Akoutoung below 

 Prome. It is not common elsewhere, except about Prome. The 

 animal has a mucus pore at the end of a truncated foot, and a lobe 

 above, as in N. vitrinoides, Desh. A shell which Mr. Benson considers 

 as probably identical with Helix diplodon, Bens., (a Khasi hill species) 

 occurs rarely in the Arakan hills. It is a Nanina with a small lobe 

 above the mucus pore near the end of the tail, which, however, is more 

 flattened and less truncated than in species of the Trochomorplia section 

 generally. 



No species of the Ariophanta section, so largely represented in 

 India, has as yet been found in Pegu or Arakan ;* N. retrorsa, Gould, 

 being hitherto unknown N. or W. of Molmein. Macrochlamys and 

 Trocihomorpha (unless N. textrina and N, pansa belong rather to 

 HemipUcta than to the former,) comprise the great majority of the 

 A r u»ince. The forms belonging to the first named section are so 

 numerous, and distinguished by such minute differences, that their 

 study is one of great difficulty. 



Helix. 



Amongst the true Helices in Northern Pegu, several forms assigned 

 to the section Dorcasia, Gray, are conspicuous. They appear to re- 

 present in Burma, H. fallaciosa, Fer., H asperella, Pfr., and their 

 allies of the Indian peninsula, and they might all perhaps with greater 

 correctness be classed together in the same section. Amongst these 

 forma is H. similaris, Fer., of which H. scalpturita : Bens , and 

 H. Zoroaster, Theobald, appear to be varieties. These shells occur in 

 the drier portions of the Irawady valley, and are not found below 

 Prome, but they extend northwards to beyond Ava. The variety 

 named by Mr. Benson H. scalpturita sometimes wants the coloured 



* Nor is this section, so far as I know, represented in the Himalayas. 

 N. Himalwyana, Lea, being almost certainly N. intemqAa, Bens., and the 

 assigned locality due to an error ; while H. cyclntrema, Bens., lately described 

 from the hills N. of Tirhoot, is a sinistrorse member of the asp or alia group, and 

 closely allied to that species, as may be seen from its expanded lip and grami- 



I - i.irface. The animal in doubtless a true Helix, and not a N'mina. 



