360 AFRICAN NESOPUP.E. 



vertical aperture is rounded and contracted by 5 folds: the 

 right one of the parietal wall is connected with the termina- 

 tion of the outer lip; the second is more deeply placed. 

 There is a high columellar lamella and two palatal folds, of 

 which the upper emerges to the peristome and unites there- 

 with, the second disappears before reaching it. The peri- 

 stome is moderately expanded and thickened within, the 

 right margin bent inward by the upper furrow which cor- 

 responds to the upper palatal fold. Length 1%. diara. 1. 

 aperture % x l/ 2 mm. (Jirkcli \ . 



Abyssinia : plateau of Bora-Beit-Andu, province of Ha- 

 maszen, and on the Keren Mts., Bogos, under rotten leaves, 

 wood and stones (Jickeli). 



fiipa bi-s-ulcata .JICKELI, Malak. Blatter, 1873, p. 107: 

 Fauna der Land- und Stisswasser-Mollusken Nord-Ost- 

 Afrika's, in Nova Acta Aead. Caes. Leop.-Carol. Germ. Nat. 

 Cur., vol. 37, 1875, p. 119, pi. 5, f. 10. 



No Abyssinian specimens are at hand, and as Mr. Buruup 

 has observed, Jickeli 's figures do not agree in proportion* 

 with his measurements. The latter indicate a shell proper 

 tioned like the following form. 



56r/. N. bisidciifd rhorlcxifiitd n. subsp. PL 34, tigs. 5, 6. 



The shell is more elongate and cylindric than in N. bisid- 

 cdt<i according to Jickeli 's figures, the penult whorl equalling 

 the last in diameter. The whorls are strongly convex, the 

 striation less regular and not so strong as in N. griquc^a/ndica. 

 Latter part of the last whorl is a little flattened laterally 

 and close behind the outer lip there is a short furrow above 

 the middle. The teeth are much smaller than in griqwilan- 

 dica and farqnkari, the palatals especially being shorter. No 

 basal or subcolumellar fold is present. 



Length 1.85, diam. 1 mm. ; 5 whorls. 



Rhodesia: Victoria Falls (Connolly). 



A specimen of this form was sent with N. griquala/ndica. 

 It differs so much in contour from Jickeli 's figures that, tak- 

 ing the locality and fauna! zone into consideration, I am dis- 

 posed to give it subspecific standing. N. bisulcata is figured 



