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. (Lrochomorpha) 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. witrinoides, 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 Z’rochomorpha section 
generally, 
No species of the Ariophanta section, so. largely represented in 
India, has as yet been found in Pegu or Arakan ;* WN. retrorsa, Gould, 
being hitherto unknown N. or W. of Molmein. Macrochlamys and 
Trochomorpha (unless N. textrina and N. pansa belong rather to 
Hemiplecta than to the former,) comprise the great majority of the 
Nanine. 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 Helzces in Northern Pegu, several forms assigned 
o 
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 
forms 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. Himualayana, Lea, being almost certainly N. interruwpta, Bens., and the 
assigned locality due to an error; while H. cyclotrema, Bens., lately described 
from the hills N. of Tirhoot, is a sinistrorse member of the asperella group, and 
closely allied to that species, as may be seen from its expanded lip and granu- . 
jate surface. The animal is doubtless a true Helow, and not a Nantina. 

