412 Mr. W. H. Benson on some species of Cyclophorus. 



part still preserves the expanded edge, so different from the sharp 

 lip present in the mountain species. 



2. Cyclophorus pyrotrema, nobis. 



Testa umbilicata, turbinato-conica, solida, superne costis spiralibus, 

 obtusiusculis, confertis, striisque obliquis confertissimis sculpta, 

 castaneo albidoque fulguratim strigata et marmorata ; spira conica, 

 elevatiuscula, apice acuto. Anfractibus 5 convexis, ultimo fascia 

 albida mediana, infra periphseriam obsolete angulatam fascia lata, 

 subtus nonnullis aliis castaneis ornata ; basi valde convexa circa 

 umbilicum submediocrem pervium albida ; apertura vix obliqua, 

 irregulariter subcirculari, superne angulata, intus lactea vel caeru- 

 lescente ; peristomate duplici, breviter ad anfractum penultimum 

 adnato, interno continuo, expansiusculo igneo, externo reflexiusculo 

 albido, margiue columellari sensim arcuato, fere verticali, subrevo- 

 luto, subsinuato. Operculo normali, tenui, pallide fusco, margine 

 anfractuum elevatiusculo, scabro. 



Diam. major 36, minor 30, alt. 26 mill. 



34, 28, — 24 mill. 



26, 21, — 18 mill. 



Hub. ad Sikrigali et Patharghata, Babar, et ad Rajmahal Beugalise. 

 In rnpibus umbrosis et sub arboribus, inter folia emortua, annis 

 1831 et 1835, ipse detexi. 



A variety occurs in which the shell is of a pale buff colour, 

 darker towards the apex, the bands and markings being obsolete, 

 and the colour of the peristome being equally vivid with that of 

 the typical shells. Another thinner variety occurs, in which the 

 interior coloured lip is not present. 



Sowerby, in 1834, marked this species as C. Involvulus ; how- 

 ever, the typical form of that species proves to be more depressed, 

 the umbilicus more open, the aperture more rounded, with an 

 orange interior, while in this species it is cserulean white or 

 milky. 



A description of the animal will be found in the last vol. of 

 the ' Zoological Journal ' under the name of C. Involvulus. 



With a general resemblance in form to C. Indicus, Desh., it 

 will be at once distinguished by the absence of a keel or acute 

 spiral ribs, by the wider umbilicus, less developed peristome, and 

 more elevated form. The very gradual arcuation of the colu- 

 mellar lip is also an essential character, detracting from the 

 uniformity of the circular aperture. The sinus observable at 

 this part, impinging on the plane of the aperture, is also con- 

 spicuous in C. Indicus. 



3. Cyclophorus Exul, nobis. 



Testa angustissime umbilicata, fere perforata, globoso-turbinata, teuui, 

 undique lineis spiralibus vix elevatis, superne 8-9 valde obtusis, 



