1869.] Contributions to Indian Malacology . 135 



peristoma brevissime adnatum, duplex ; internum parum porrectum, 

 supeme juxta suturam vix sinuatum ; externum leviter expansum, 

 continuum, a peristomate interno suleo discretum, supra ejus sinutn 

 in alam verticalem parvam, instar tubuli imperfecti, antice spectantem 

 anfractum penult imum non attingentem, breviter cucullatim produc- 

 tion. Operc ? Diam. maj. 19J, min. 16, axis 9 J, mill. Ap. diam. 

 intus 63-. 



Sab. In provincid South Canara ; detexit H. Beddome. 



Shell widely umbilicated, depressed, thin, covered with a thick, oli- 

 vaceous brown epidermis ; beneath the epidermis white, faintly striated. 

 The epidermis is closely rugately striated near the suture. Spire 

 convex ; apex scarcely exserted, obtuse ; suture deep. Whorls 5, round- 

 ed, the last cylindrical, descending very gradually for a considerable 

 distance behind the aperture. Mouth oblique, circular ; peristome 

 double, the two portions divided by a groove ; the inner slightly 

 projecting, with a very small, almost obsolete sinus above, close to 

 the suture ; the outer a little expanded, and produced above into 

 a short vertical wing, opening in front, and forming an imperfect 

 tube ; it is just above the imperfect sinus in the inner peristome, 

 and does not touch the penultimate whorl. Operculum unknown. 

 Major diameter 0.8, minor 0.62, axis 0.36 ; diameter of the aperture 

 0.26 inch. 



In the absence of the operculum, it is not easy to say if this shell 

 should be classed as Oyeloplwrus or Pterocyclos. It might even be 

 a Hhiostoma, and would in that case be another instance of the occur- 

 rence on the Malabar coast of Burmese and Malay forms, unknown 

 elsewhere throughout the Indian Peninsula. In the extremely small 

 wing not touching the penultimate whorl, the absence of a deep 

 incision in the interior peristome beneath the wing, the large mouth, 

 and uniform colouring, the species differs from all Indian forms of 

 Pterocyclos. There can be no question of its being dintinct also from 

 all known forms of Ogclophorus, but, except for the wing, it approaches 

 very nearly to C. ravidus, Bens., and G. annulatus, Trosch., both of 

 which, however, are flatter. 



7.— Spiraculum Fairbanki, n. sp. 



Testa late umbilicata, depressa, sub-discoidea, decussatim striata, 

 griseo-albida, irreg alar iter castaneo-strigata et maculata, fascia inter- 



