106 HELIX. 



H. LOVENI, Krauss. PL 20, fig. 74. 



Perforate, thin, with regular distant elevated striae, and very 

 close decussating, spiral lines, corneous, pellucid, epidermis hirsute, 

 spire subpapillary ; whorls 5, somewhat flattened, the last carinate 

 above, base convex. Diam. 10 mill. 



So. Africa, 



H. KNYSNAENSIS, Pfr. PL 20, fig. 75. 



Narrowly umbilicated, somewhat solid, ribbed-striate, waxy,, 

 corneous olivaceous ; whorls 4, a little convex, the last inflated, base 

 smoothish, shining ; aperture pearly, columella dilated above. 



Diam. 24 mill. 



Cape of Good Hope* 



H. PERPLICATA, Benson. PL 20, fig. 76. 



Narrowly umbilicated, thin, corneous, subdiaphanous, rather 

 distantly obliquely plicate, the interstices longitudinally striated, 

 suture impressed : whorls 5-5 i, slightly convex, slowly increasing, 

 the last slightly depressed, not descending, more convex below. 



Diam. 7 mill. 



Cape of Good Hope. 



H. MICROSCOPICA, Krauss. PL 20, figs. 77, 78. 



Very narrowly umbilicated, striulate, thin, pellucid, light 

 corneous ; whorls 4, convex, the last not descending, base somewhat 

 flattened. Diam. 1:15 mill. 



So. Africa. 



H. DUMETICOLA, Benson. PL 20, fig. 79. 



Somewhat widely umbilicated, thin, costulately striate above, 

 smoother below, corneous white, under a caducous yellowish, pol- 

 ished epidermis, suture impressed ; whorls 3?-4, slightly convex, 

 the last rapidly increasing, subdepressed, base convex. 



Diam. 11 '5 mill. 



Cape of Good Hope. 



H. COSMIA, Pfr. PL 20, fig. 80. 



Openly, deeply umbilicated, thin, rugosely subplicate, translucent, 

 a little shining, waxy, greenish corneous; whorls 4, sub plane, 

 rapidly increasing, the last dilated in front, not descending. 



Diam. 7 mill. 



Near Camp's Bay, Cape of Good Hope. 



Is H. munda, Bens, not Ads., and H. cerea, Pfr. not Gould. 



