Reference List of South African Non-marine Mollusca. 89 



Although the extremes of form vary greatly, almost every inter- 

 mediate grade can be traced, so that the varietal name is hardly 

 retainable. 



110. ENNEA ZELOTA, Melv. & Pons. [S.A.M.] 



1907. Ennea zelota, M. & P., A.M.N.H. xix. p. 97. pi. 6, f. 7. D.F. 

 Type in British Museum. 

 Hab. NATAL, Port Shepstone ; Equeefa (Burnup). 



GENUS STEEPTOSTELE, Dohrn, 1866. 

 (Mai. Blatt. xiii. p. 128.) 



Type of Genus, S. lotopliaga (Morel). 



111. STEEPTOSTELE HERMA, sp. nov., pi. 2, f. 3. [S.A.M.] 



Shell very small, elongate, narrowly rimate, slightly glossy, trans- 

 lucent, milky olivaceous. Spire produced, tapering, very narrow, 

 apex rounded. Whorls 7, gradually increasing, little convex, but 

 impressed at the suture ; the first 2 smooth, remainder beautifully 

 sculptured with rather coarse, irregular, almost straight striae. 

 Suture deep. Aperture short, piriform, virtually edentulate, the 

 only processes being an almost imperceptible parietal callosity, and 

 an incurvation of the outer lip about one-third of its length below 

 the suture. Peristorne not thickened, thinly reflexed. 



Shell 4-5 x 1'3 ; aperture -9 x "8 ; last whorl 1-5 mm. 



Type in British Museum. 



Hab. EHODESIA. Victoria Falls (Connolly). 



This beautiful little species belongs to a group of Central African 

 shells which have been placed of late years in Streptostele. As their 

 columella is not achatinoid, as it should be in Dohrn's genus, it is 

 probable that a new section will have to be founded for them. 



FAMILY BHYTIDID^, Pilsbry, 1893. 



(Man. of Conch, viii. p. 135.) 



GENUS NATALINA, Pilsbry, 1893. 



(Man. of Conch, viii. p. 135.) 

 ( = Aerope, Albers, 1860, non Leach, 1813.) 



Type of Genus, N. caff r a (Fer.). 



The species which follow have been variously attributed to 

 Natalina, or to Rhytida, Albers (Die Helic., 1860, p. 89. Type 

 greenwoodi, Gray), and its subgenera, Macrocycloides, von Martens 



