HELIX. 69 



H. BIDENTICULATA. Benson. PI. 13, fig. 59. 



Perforate, obsoletely radiately striate, whitish, suture impressed, 

 whorls 6, narrow, convex, with two slightly elevated spiral lines above, 

 the last whorl carinated, convex below ; aperture with two minute 

 distant basal teeth, the right one largest, near the margin. 



Diam. 3 mill. 



Nilgherri Mts., India. 



H. DAGHOBA, W. and H. Blanford. PI. 13, fig. 60. 



Narrowly perforate, obliquely striated, spirally sulcate, carinated, 

 suture impressed ; whorls 7-8, slowly increasing, subconvex, the 

 last not descending, carmate, base convex, smooth ; peristome with 

 two basal teeth. Diam. 6 mill. 



Patchamullies and Kalryenmullis Mts., India. 



H. DIPLODOX, Benson. PI. 13, fig. 61. 



Perforate, thin, smooth, a little striulate, whitish under a corneous 

 epidermis; whorls 6J, very slightly convex, the last acutely 

 carinated, not descending in front, base somewhat convex, in front, 

 near the periphery flattened-excavated, becoming suddenly more 

 tumid in the middle ; aperture with an obtuse subcolumellar tooth, 

 and another sinuated, pliciform one. Diam. 6*5 mill. 



Teria Ghat, Khasi Mts. 



H. INGRAMI, Blanford. PI. 13, figs. 62, 63. 



Imperforate, thin, diaphanous, light corneous, very minutely, 

 closely granulately decussate-striate ; suture thread-margined ; 

 whorls 6?, flattened, periphery acutely carinated, not descending, 

 compressed above and below the carina, base flattened, externally 

 decussately striate, umbilical region impressed ; aperture with two 

 entering lamellae on the base, the exterior one largest, with a third 

 transverse lamella behind it, lip white, somewhat thickened. Diam. 

 6-25 mill. 



Pegu. 

 Section LIBER A, Garrett, 1881. 



So far as known this peculiar group, containing about a dozen 

 species, is peculiar to the Society and Cook's Is. ; in the former 

 archipelago, they are confined to Tahiti and Moorea. 



H. CAVERNULA, Hombr. et Jacq. PI, 13, figs. 75-77. 



Discoidal, whorls a little concave above, strongly costate, whitish, 

 tessellated with chestnut ; periphery acutely laminately carinated, 



