178 CYCLOPHORID^, 



colour. Spire tiirreted, with convex sides, apex rather obtuse, 

 sutures well impressed. Wliorls 7i^, convex, the last more closely 

 wound than tlie penultimate, to which it is scarcely attached just 

 behind tlie mouth ; the basal keel compressed, costulate, dilated in 

 front ; the space inside the keel and around the umbilicus is of 

 moderate size and ribbed. Aperture nearly cii'cular and subvertical, 

 w ith the opening of the basal canal on the left side of the base, and 

 not quite in tlie same plane as the aperture, but turned rather 

 downwards. Peristome white, thickened, expanded, and turned 

 hack, pi'oduced above to the right of the penultimate whorl and 

 below around the canal, narrow on tlie columellar marain, and only 

 united for a short distance with the penultimate whorl. 



" Length O'GS [16 mm.], breadth (including the peristome) 0"25 

 [6*25 mm. |, minor diameter from front to back 0-28 [5"75 mm.], 

 width of aperture inside 0*13 [.3-25 mm.] inch." 



Hah. India: Tinevelly Ghats (5^(Wc»7»e). 



" This species of Cataulus, the third hitherto obtained from the 

 hills of Southern Tudia, 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. caJcadensis. 



Bjdd., having a similarly shaped spire, aperture, and basal 



channel. I have only seen one specimen of C. costulatus ; this 

 differs from C. calcadensis not only in having stronger sculpture, 

 but also in being rather shorter and in having one whorl less 

 in the spire. The colour of 0. costulatics also is paler than that of 

 the Calcad shell, and the lip of the aperture is white. 



" Like the other Southern-India forms, 0. calcadensis. ('. recur- 

 I'atus, and the species hereafter described [C. albesceiis'], C. costu- 

 Jatus 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 ne'arly at the 

 lowest portion of the mouth (it is slightly to the left in ('. pyra- 

 viidatua, C. eurytrema, and C austenianus ; basal in the smaller 

 forms, like templemanni?i\\(S. C. layardi). I find that in C. tortuosus 

 the position of the canal is precisely as in C. calcadensis and 

 C. costidatvs (in C. recurvatus, the sinistral position of the canal 

 is much more marked)." {Blanford.) 



2-57. Tortulosa cuniingi, Pfeifer. 



Cataulus cumingi, Pfeiffer, Prop. Zool. Soc. 1856, p. .339 : id., 

 Novit. Conch, ser. 1, i, 1857, p. 91, pi. 25, figs. 16, 17 ; id., Men. 

 Pneum. Suppl. 1, 1858, p. 87 ; Theobald, Cat. Shells Brit. India, 

 1876, p. 41; .rousseaume, Mem. Soc. Zool. France, vii, 1894, 

 p. 311; Kobelt & Mollendorff, Nachr. Deuts. Malak. Ges. xxix, 

 1897, p. 143 ; id., Cat. Pneum. 1899, p. 39. 



Cataulus cumingii, Sowerby, Thes. Conch, iii, 1864, pi. 264, fig. 3 ; 

 H. Nevill, Euum. Helic. Pueum. Ceylon, 1871, p. 5 ; Reeve, 

 Conch. Icon, xx, Pupinidte, 1876, pi. 6, fig. 52. 



Cataulus thcaitesi?, Sykes, Proc. Malac. Soc. iii, 1898, p. 68. 



Tortulosa (JEucataulus) cuiningi, Kobelt, Das Tierreich. Lief. 16, 

 1902, p. 284. 



