HELIX. 69 



H. BIDEXTICULATA. 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 78, slowly increasing, subconvex, the 

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

 two basal teeth. Diam. 6 mill. 



Patchamullies and Kalryenmullis Mts., India. 



H. DIPLODON, Benson. PL 13, fig. 61. 



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

 epidermis; whorls 6;F, 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. PL 13, figs. 62, 63. 



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

 closely granulately decussate-striate ; suture thread-margined ; 

 whorls 62, 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 LIBERA, 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, 



