194: Mr. W. H. Benson on the genus Diplommatina. 
tula, subcirculari; peristomate duplicato, expanso; marginibus 
callo parietali appresso junctis; operculo nullo. 
Sp. 1. D. (Bul.) folliculus, Pfr. Monogr. vol. 11. p. 81-2. Cary- 
chium costatum, Hutt. MSS. 
Sp. 2. D. (Carych.) costulatum, Hutt. MSS. 
Testa minima, subimperforata, cylindrico-ovata, minute costulata, 
costulis obliquis regularibus, approximatis ; anfractibus 5, superio- 
ribus celeriter decrescentibus ; ultimo angustiori, antice subascen- 
dente; sutura profunda; apice obtuso ; apertura rotundata, con- 
tinua, peristomate tenui, expanso, duplicato, labro secundo retro- 
misso a costulis satis distincto. 
Long. 2 mill., diam. vix 1 mill. 
Hab. in montibus sub-Himalayanis occidentalibus. 
It differs abundantly, in form as well as size, from D. folliculus, 
Pfr., in which also the double lip, distinct from the ribs, is 
strongly marked, although not noted in his characters. The 
present species is less than two-thirds the length of D. folliculus, 
and does not present the long conical spire of that species, de- 
creasing more suddenly towards the apex. 
It inhabits the same localities as the larger shell, abounding 
in masses of decayed fallen leaves, and under stones, in damp 
situations beneath trees, on the shady sides of the mountains, 
at from 5000 to 9000 feet elevation, at Simla, Mussoorie and 
Landour. 
Pfeiffer has given Bengal as the habitat of D. folliculus. It 
has never been met with in that province. Capt. Hutton dis- 
covered it at Simla near the Sutlej, and I have taken it abun- 
dantly at Landour, and still further eastward at Nynee Tal, and 
on the Ghagur Mountain towards the head of the Sarjou. It 
will probably be found in Nipal, or even further in the range, 
when the attention of visitors to those quarters shall be attracted 
to these diminutive animals, or perhaps the known species may 
be there replaced by other allied forms. 
In the same localities as Diplommatina, but less abundantly, 
occurs a new species of Carychium proper, quite distinct from the 
European species C. minimum and speleum, Rossm., as well as 
from the American C. ewiguum, Say. The following are its cha- 
racters :— 
C. Indicum, nobis. 
Testa minima, rimata, ovato-cylindracea, hyalina, nitida; anfracti- 
bus quinque, superioribus convexis, ultimo et penultimo subpla- 
nulatis ; apice obtuso; sutura impressa; apertura ovata, peristo- 
mate incrassato, margine dextro intus medio callo dentiformi pre- 
dito ; plica parietali unica, columellari 1 obliqua. 
Long. 14 mill., diam. 2 mill. 
Hab. ad Simla et Landour montibus sub-Himalayanis, foliis putridis 
adherens. ‘ 
