128 Contributions to Indian Malacology, [No. 2, 



Diam. maj. 8, Min. 6£, axis 2J millem., ap. diam. intus 2. 



Hob. Travancore. 



Shell very widely umbilicated, depressed, discoidal, thin., olive- 

 coloured, very closely and minutely striated, less polished than the other 

 species, and covered with spiral ribbing. The spire is flat, or nearly so, 

 but the innermost whorls being deficient in the only specimen sent 

 for description by Major Bedclome, it is impossible to say whether the 

 apex is slightly exserted or not. The suture is much impressed. 

 Whorls about 4 in number, convex ; the last one descending near the 

 mouth, smooth near the suture, both above and below, with 7 spiral 

 ribs ; 4 above, the outermost forming the periphery of the shell, and 3 

 below, separated from the others by a smooth space ; 3 of the upper 

 and 1 of the lower can be traced on the penultimate whorl near the 

 suture, but become obsolete on the inner whorls. The umbilicus 

 exposes all the whorls below. Aperture diagonal, round, peristome 

 only joined for a very short distance to the penultimate whorl, 

 thickened, all in one plane and not expanded, faintly edged with white 

 inside, blackish externally. 



The operculum differs from that of Cyclophorus planorbis by the 

 edges of the whorls being less produced externally, and by its being 

 in consequence less concave. Major diameter 0.31 inch, minor 0.27, 

 axis 0.9. 



This species recently found by Major Beddome in the Travancore 

 hills, is easily distinguished from the last species by its numerous spiral 

 ridges, and by the absence of the glassy surface, so characteristic of both 

 the other species. But two specimens have been found, of which I 

 have only seen one. 



3. -Cyclophorus (Ditropis) convexus, n. sp. 

 PI. XVI, fig. 3. 

 Testa aperte umbilicata, depresso-co?ivexa, tenuis, nitida, vitrea, 

 glabra, olivacea, minnutissime et obsolete decussato-striatula. Spira 

 convexa ; apice obtuso ; sutura impressa intus marginata. Anfr. 4, 

 convexi ; ultimios versus aperturam paullum descendens, teres, juxta 

 suturam fascia lata fused pictus, extus pallidior, carina una validd ad 

 peripheriam, altera ad basin circumdatus ; umbilico perspectivo, omnes 

 anfractics exhibens, confertim spiraliter liratus. Apertura obliqua 

 rotunda ; peristoma rectum simplex, incrassatum atque continuum. Oper- 



