350 Mr. W. H. Benson on an Australian Diplommatina, 



obtuso, sutura leviter subcanaliculata. Anfractibus 5, ultimo ro- 

 tundato, basi convexo ; apertura late lunari, vix obliqua, peristo- 

 mate acuto, intus interdum subremote albido-labiato, margine 

 columellari oblique descendente, subsinuato, leviter incrassato, su- 

 perne reflexiusculo. 



Diam. major 24, minor 20, axis 11 mill. 



Hab. ad Darjiling. 



Distinguished by the proportion of the whorls and other cha- 

 racters from H. resplendens, Philippi_, and from H. vitrinoides also 

 by the greater depth of the last whorl, and the characters of the 

 mouth. I have long possessed the pale-coloured variety from 

 Darjiling ; the acquisition of a second dark-coloured specimen 

 from Mr. Trotter has confirmed the distinctness of the species. 



PfeifFer has ascribed his handsome reversed species, Helix Ba- 

 jadera, to Bengal, on the authority of Ouming's collection. I 

 have always held this habitat as more than doubtful ; no speci- 

 men having ever been detected in any quarter of the Bengal 

 Presidency by myself or my fellow-labourers in this field. I am 

 now enabled to announce the true habitat as Bombay, a small, 

 but characteristic specimen having just been transmitted to me 

 by Mr. T. Jerdon from that locality. The habitat of Helix vitel- 

 lina, Pfr., is recorded as unknown; a shell received from the 

 same indefatigable naturalist, from the base of the Nilgherries, 

 belongs, without doubt, to that form. 



6. Clausilia Ids, nobis, n. s. 



Testa vix rimata, fusiformi, oblique costulato-striata, pallide cornea, 

 spira gradatim attenuata, apice obtusiuscido ; anfractibus 8—9, vix 

 convexiusculis, ultimo ad basin rotundato, antice fortius remo- 

 tiusque costulato ; apertura pyriformi, lameUis subsequalibus, in- 

 feriori furcata ; plicis palatalibus duabus, 1™* L)ngissima, a sutura 

 remotiori, 2"^^ obliqua, brevi, a lunella, satis distincta, interdum 

 vix divisa, subcolumellari immersa ; peristomate continue, superne 

 soluto, undique breviter reflexo. 

 Long. 13, diam. 3 mill. Apert. long. 3, lat. 2 mill. 

 Hab. ad Darjiling. Teste R. Trotter. 



This is the third species which has been discovered in the 

 Northern Dependencies of the Bengal Presidency, and the second 

 only from the Cis-Gangetic Territory. The others are CI. loxo- 

 stoma, nobis, described in 1836 from specimens obtained from 

 the Khasya Hills to the south-east of the river Burhampooter, 

 and CI. eylindrica, Gray, discovered by Capt. Hutton at Simla, 

 near the Sutlej in the Western Himalaya, and found subsequently 

 by myself ranging through the mountain chains of Sirmore and 

 Kemaon towards the river Gagra. 



None of the species of this genus are to be met with in the 

 Gangetic plain, nor have any yet been obtained to the south and 



