356 AFRICAN NESOPUP^. 



VII. AFRICAN SPECIES. 



fi ] . Angular and parietal lamella? present. 



6 1 . Angular lamella rather high, strong and curved. 



r 1 . Length 3 mm.; nearly smooth. St. Helena. 



N. turt&ni, no. 60. 

 r-. Length less than 2 mm.; closely rib-striate. 



d l . Sculpture of rather coarse, very oblique 



stria? ; shell ovate, white ; 1.5 x 1 mm. 



British E. Africa. N. iota, no. 57. 



d~. Sculpture of fine, close rib-striae; shell 



brown. 



c 1 . One broad median external fur- 

 row behind the aperture; lower 

 palatal and basal folds rather 

 deeply immersed ; length 1.4 to 

 1.6 mm. S. Africa. 



N. (jriqualdnd'U'a, no. 54. 

 ', One very slight impression behind 

 aperture ; lower palatal but little 

 immersed, basal minute, in sub- 

 columellar position; length 1.6- 

 1.65 mm. S. Africa. 



A T . farquhari, no. 55. 

 c 3 . One very slight impression be- 

 hind aperture ; palatals rather 

 short: no basal fold; length 1.85 

 mm. Rhodesia. 



A T . ft. rhodesiana, no. 56a. 

 e*. Two deep furrows behind aper- 

 ture ; no basal fold ; length 1.87 

 mm. Abyssinia. 



N. bisulcata, no. 56. 



6 2 . Angular lamella short ami low ; 2.25 to 2.4 mm. 

 long. 



c 1 . Surface densely pitted: one palatal fold or 

 none. Rhodesia. N. corrugata, no. 58. 



c-. Nianing, West Africa. 



N. megalomajtoma, no. 59. 



