194 Mr. W. H. Benson on the genus Diplommatina. 



tula, subcirculari ; peristomate duplicate, expanse ; marginibus 

 callo parietali appresso junctis ; operculo nuUo. 



Sp. 1. D. [Bui.) folliculus, Pfr. Monogr. vol. ii. 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. folliculuSy 

 Pfr., in wbicli 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. folliculuSj 

 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 spelaum, Bossm., as well as 

 from the American C. exiguum, S&j. 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 prae- 

 dito ; plica parietali unica, columellari 1 obliqua. 



Long. 1^ mill., diam. ^ mill. 



Hab. ad Simla et Landour montibus sub-Himalayanis, foliis putridis 

 adhaerens. 



