156 ctclophobidjE. 



pearly deiiticulatioiis, lurgest on the outer (dextral) margin and 

 gradually decreasing slightly in size on the upper and basal 

 edges, vanishing entirely near the umbilicus ; the external 

 peristome is slightly expanded, the edge cut into minute teeth 

 like those of a saw except on the inner or columellar margin. 

 Operculum externally slightly concave, white, calcareous ; the 

 spiral sculpture obsolete )iear the centre in old specimens ; 

 internally membranaceous. 



"Major diameter 8.7, minor 7, axis 5^, diameter of the aperture 

 3i millim." (Blanfofd.) 



Hab. India : Calcad Hills, Travancore (L'eddome, BourdiUon) ; 

 Tinuevelly Hills {Beddome). 



" This is a very curious and interesting species which, while 

 differing in many respects from any known form, has marked 

 affinities with shells belonging to distinct groups. Had the shell 

 been discovered without the operculum, there could have been 

 very little hesitation in considering it a large form of Ci/athoponia ; 

 the sculpture and general sliape are precisely those of the types of 

 that genus, and in some species, such as Cyat?ioj>oma filocinctum, 

 there is a thick epidermis, and also the very singular internal 

 crenulation of the mouth, which is more marked in the present 

 shell than in any allied species. The operculum, however, is 

 totally different : instead of the whorls having the curious raised 

 and incurved edges so characrei'istic of Cyuthopoma they are flat 

 and almost obsolete near the centre, on the outer surface, being 

 far less distinct than in typical species of Gyclotus. 



" The hairy fringe around both the periphery and the umbilicus 

 so closelv resembles that in CyclopJiorus (Craspedotropis) cuspidatas, 

 Bens., that there can be no question of a certain affinity between 

 tlie two species, and there is considerable resemblance in their 

 general form. The apertures, however, differ greatly, and there 

 are marked distinctions in the operculum." [Blanford.) 



224. Mychopoma limbiferum, Blaaford. 



Mycho2)oma limbiferum, Blanford, J. A. S. B. xxxviii, 1869, p. 133, 

 pi. 16, ligs. 4-4 6 (shell), 4:C,4d (operculum), p. 131, text-fig. 1 

 (dentition); Hanley & Theobald, Conch. Ind. 1875, .pi. 136, 

 ligs. 2,3; Pfeiffer, Men. Pueum. Suppl. 3, 1875, p. 45; Theobald, 

 Cat. Shells Brit. India, 1876, p. 38; Thiele, Nachr. Deuts. 

 Malak. Ges. xxxiii, 1901, p. 91 ; Kobelt, Das Tierreich, Lief. 16, 

 1902, p. 229. 



Cyathopoma {Mi/cJiopoma) limbifenim, Nevill, Hand List, i, 1878, 

 p. 260. 



Laqochilus (s. str.) limbiferum, Kobelt & Mijllendorff, Nachr. 

 i)euts. Malak. Ges. xxix, 1897, p. 83; id., Cat. I'ueum. 1899, 

 p. 11. 



Orifjinal description: — " Shell uarro'.\ly umbilicated, turbinate, 

 thin, covered with a thick deciduous, yellowish brown epidermis, 

 with dai'k spiral and oblique stripes or more frequently perhaps 

 altogether dark brown, with a fringe of short hairs round the 



