188 Mr. W. H. Benson on new species 0/ Cyclostoma. 



small ; and, on comparison, it proves to be even narrower than 

 that of C. stenomphalum, Pfeiffer. C. porphyriticum is also allied 

 to, but quite distinct from, Mousson^s C. Zollingeri. 



6. C constrictum, nobis, n. s. 



Testa perforata, ovato-conica, glabra, costis angustis obUquis distan- 

 tibus munita, translucente, albida vel rufula ; spira elongato-conica, 

 apice obtuse, sutura valde impressa ; anfractibus 4 rotundatis, su- 

 perioribus glabris, sequentibus remote costulatis, ultimo mox con- 

 fertissime costulato-striata, pone aperturam strangulate, anticeque 

 late constricto ; apertura circulari, verticali, f longitudinis sequante, 

 peristomate undique reflexo ; operculo testaceo, multiopirato, su- 

 tura inconspicua. 



Diam. 2, alt. 3^ mill. 



Hab. ad Darjiling Himalayse Sikkimensis. 



This shell has apparently an affinity with the Philippine C. 

 minus of Sowerby, but differs in its more tapering form, smaller 

 size, perforation, diverse sculpture, and in the strangulation of 

 the last whorl behind the aperture, in which feature it exhibits 

 an approach to the more shortened C. gibbum, Fer., from Turon 

 in Cochin China, and to the depressed C. strangulatum, Hutton, 

 so abundant in the more western portion of the Himalaya. 



7. C. filocinctum, nobis, n. s. 



Testa subaperte umbilicata, turbinato-globosa, infra spatium hume- 

 rale glabrum lineis frequentibus elevatis cingulata, albida, epider- 

 mide fusca induta ; spira elevata, subconica, sutura impressa, apice 

 papillari ; anfractibus A\ rotundatis, ultimo cylindraceo ; apertura 

 circulari, superne vix angulata, prope umbilicum leviter sinuata, 

 |- longitudinis sequante ; peristomate duplici, interiori simplici acuto, 

 exteriori breviter reflexo ; umbilico profundo, perspective. 



Diam. maj. 3, minor 2\, alt. 2\ mill. 



Hab. ad apices montium Nilgherries. Teste Jerdon. 



This little species is distinguished by the spiral ridges, which 

 are numerous between the shoulder of the whorl and the umbi- 

 licus, but are deficient near the suture, as well as by its double 

 peristome. The epidermis is deciduous. 



8. C. sarritum, nobis, n. s. 



Testa subimperferata, ovato-conica, liris spiralibus crebris, sulcis an- 

 gustis divisis, munita, ferrugiaee-albida, apice rubente, sutura bene 

 impressa, apice obtuso ; anfractibus 4 valde cenvexis ; apertura 

 vix obliqua, ovata, f longitudinis sequante, peristomate acuto, ex- 

 pansiusculo, marginibus disjunctis, columellari superne angulato, 

 pariete calloso. 



Long. 2, diam. 1} mill. 



Hab. in muscis arborum vallis profundae, prope Cherra Poonjee, in 



• montibus Garo dictis, prseter fines Orientales Provincise Bengalise. 



