214 W. T. Bhinford — Contributions to Indian Malacology. [No. 4, 



ouly united for a short distance with the penultimate whorl. Length 0'65 

 inch, breadth (including the peristome) 25, minor diameter from front 

 to back 23, width of aperture inside 0'13. 



This species of Oataulus, the third hitherto obtained from the hills of 

 Southern India, is distinguished from all other known forms of the genus 

 by its comparatively coarse ribbing across the whorls. In other respects, 

 it closely approaches C. caleadensis, Bedd. (J. A. S. B , 1869, xxxviii. pt. 

 2, p. 137, pi. xvi. fig. 8), having a similarly shaped spire, aperture, and 

 basal channel. I have only seen one specimen of O. costulatus ; this differs 

 from C. caleadensis not only in having stronger sculpture, but also in being 

 rather shorter and in having one whorl less in the spire. The colour of 

 O. costulatus also is paler than that of the Calcad shell, and the lip of the 

 aperture is white. 



Like the other Southern-Indian forms, C. caleadensis, G. recurvatus, 

 and the species hereafter described, G, costulatus has the canal a little to 

 the left of the lowest portion of the aperture, or nearer to the umbilicus than 

 to the outer margin. In most Ceylonese species of the genus, the canal is 

 nearly at the lowest portion of the mouth.* I find that in G. tortuosus 

 the position of the canal is precisely as in G. caleadensis and G. costulatus 

 (in G. recurvatus, the sinistral position of the canal is much more marked). 



27. Cataultts albescens, sp. nov. 



Testa suiperforata, subovato-tim'ita, tenuiuseula, alhido-cornea, sulsi- 

 nuate costulato -striata. Spira turrita, lateribus convexis, apice obtusius- 

 cido, suturd valde impressd. Anfr.1, convexi, ullimus aretiris convolutus, 

 antice porrectus, fere solutus, vix deseendens, carina basali transversim 

 striata, postice obsoletd, antice validd,juxta aperturam dilatatd munitus ; 

 periompJialo medioeri, plicato-striato. Apertura subcircularis, fere vertica- 

 lis, canali ad latus sinistrum marginis basalis patente, ore antice spectante. 

 Peristoma album, incrassato-reflexum, postice et ad canalem basalem produc- 

 tuni, margine columellari angudiore, cum anfractu penultimo breviter junc- 

 turn. Long. 13, diam. maj. min. apert. diam. intus vix 3 mm. 



Hab. In montibus Travancoricis baud procul ab urbe Trevandrum, 



Shell subperforate, subovately turreted, rather thin, whitish horny, 

 rather sinuately and costulately striated. Spire turreted, with the sides 

 convex, apex obtuse, suture much impressed. Whorls 7, convex, the last 

 more closely wound than the penultimate, to which it is but slightly attach- 

 ed just behind the mouth. Basal keel transversely striated, subobsolete on 

 the body-whorl near the junction of the peristome, becoming stronger in 



* It is slightly to the left in C. ^;yrrt!);«'(?«!;?/.s, C. curyircma, and C. ausicniamts ; 

 basal in the smaller forms, like C. tcmplcmanni and C. Jaynrdi. 



