Diplommatina Huttoni and Ennea bicolorén the West Indies. 111 
that the range of D. Huttoni extends more than, at the outside, 
200 or 300 miles along the base of the mountains. In the 
lains of India no Diplommatina has ever yet been found*. 
Tn the hills of Southern India, forms differing entirely from 
those of the Himalayas alone occur. The negative evidence, 
therefore, against the existence of D. Huttont, or of any other 
Indian species of the genus, over any large area of country 1s 
praewatining. And this is entirely in accordance, as has 
been remarked by Mr. Benson, with the general facts of the 
distribution of operculated land-shells in India, none being 
met with over so large an area as species of the non-opercu- 
lated forms frequently are. 
To the west of Hnductin not a single Diplommatina, or 
land-shell allied to Diplommatina, has ever been recorded. 
The genus and its allies are utterly unknown in Western Asia, 
Europe, and Africa. Not only are the Diplommatinide absent, 
but all their allies, the Cyclophoride, are equally so, with the 
exception of two or three obscure species in South Africa and 
of the anomalous genus Craspedopoma in the Azores, Madeira, 
and Canary Islands; and these few forms have at least as close 
an affinity to American types as to those of India. 
To the east and south-east of India the case is different. 
Species of Diplommatina, many of them sinistral, and of allied 
- genera have been found in Burma, Labuan (Opisthostoma De- 
Crespignii), the Philippine Islands (Arinia), the Moluccas, 
the Pelew Islands (Palaina), the New Hebrides, New Cale- 
donia, Lord Howe’s Island, Australia,and New Zealand. A 
species is said to occur also in the Sandwich Islands. Now, 
as Megalomastoma and Cyclophorus are common to the mainland 
of India, the Malay archipelago, and the West Indies, it ap- 
_ pears by no means improbable that Diplommatina may have 
the same distribution; and certainly, if D. Huttont ever mi- 
ated or was transported by natural causes from India to 
_ America, I cannot help thinking that it most probably tra- 
_ versed countries inhabited by its relations. But I cannot help 
_ doubting its having migrated at all over any extensive area. 
__ Ennea bicolor is a shell of much wider distribution. It is 
met with throughout the whole peninsula of Hindustan, and 
_ it also occurs in Burma. It lives in the plains, in cultivated 
land as well as in waste. 
It is easy to conceive that a mollusk with such habits might 
* I know of but one, doubtful exception—doubtful inasmuch as I do 
not know at what elevation the shell was found. This was in South 
Canara, on the Malabar coast. The form was one of the type ae oad to 
the hills of Southern India. The whole fauna of the coast of Malabar is 
peculiar. : 
G* 
