HELIX. 



far. CORALLINA, Mousson. 



Shell smaller, thinnish, carina more acute, light colored without 

 or with one or two bands. Diam. 13 mill. 

 Neither type nor variety have been figured. 



H. RUDIUSCULA, Pfr. PL 18, fig. 86. 



Widely, perspectively umbilicated, thin, irregularly rudely rugose- 

 striate, corneous brown ; whorls 5, subplanulate, regularly increas- 

 ing, the last not descending in front, periphery carinated. 



Diam. 9 mill. 



Habitat unknown* 



H. HIDALGOIANA, Crosse. PL 18, figs. 87, 88. 



Widely umbilicated, rather thin, subtranslucid, with rude, close 

 impressed, oblique striae, light cinnamon-chestnut color, suture 

 margined ; whorls 6, scarcely convex, slowly increasing, the last 

 acutely carinated, base more convex, shining, obsoletely striate ;. 

 aperture livid, subpearly. Diam. 25 mill. 



Hob. Oceania (loc. unknown). 



Unfigured Species. 



H. ALATA, Pfr. Sandwich Islands. 



H. DEPRESSIFORMIS, Pease. Tahiti. 



H. PROSTRATA, Pease. Is. of Central Pacific. 



H. PLANISSIMA, Pfr. Hob. unknown. 



H. GUILLOUI, Pfr. (H. Valenciennesii, Guill. not Eyd.). 



Hob. unknown. 



Subsection THYSANOTA, Albers, 1860. 

 H. GUERINI, Pfr. PL 18, figs. 95, 96. 



Very narrowly umbilicated, trochiform, epidermis rugose, 

 brownish ; whorls 7, scarcely convex, periphery carinated, closely 

 ciliated, base slightly convex. Diam. 16 mill. 



Nilgherri Mts., India. 

 H. HYBA, Benson. PL 18, figs. 91, 92. 



Deeply, somewhat openly umbilicated, subtrochiform, closely, 

 roughly, obliquely plicate above, decussated by very fine spiral 

 strise, smoother and somewhat shining and very minutely granulated 

 below, epidermis brownish corneous, suture lightly impressed, mar- 

 gined ; whorls 6, slowly increasing, scarcely convex, the last r not 

 descending, peripheral carina margined. Diam. 14 mill. 



Sub-Himalayan Hills, India. 



