Diagnosis. Shell average in size, diameter 1,32-1,64 mm (mean 1,52 mm), with 4 to 4,62 tightly coiled whorls. Apex and spire slightly and evenly elevated, spire protrusion about one-eighth body whorl width, last whorl descending more rapidly, H/D ratio 0,519-0,550 (mean 0,523). Apical whorls 1,375, very faint traces of radial sculpture visible except where worn. Postnuclear whorls with extremely fine and crowded radial sculpture, sometimes separable into microriblets and moderately larger major ribs, usually of equal fineness at 96 x magnification. Umbilicus relatively narrow, *U*-shaped, regularly decoiling, con¬tained 3,75-4,38 times (mean 3,99) in the diameter, margins weakly shouldered. Parietal lamellae 2, extending posteriorly about three-sixteenths of a whorl: upper very high and thin posteriorly with gradual descension over anterior three-quarters to point just behind anterior end of lower; 2nd not as high posteriorly, elevated portion extending further anteriorly with sharper descension to point beyond lip edge. Columellar wall with (33%) or without (67%) a recessed, cord-like ridge just above baso-columellar margin. Palatal wall without traces of dentition. Afrodonta burnupi differs in having a much wider umbilicus, the upper parietal shorter and much lower than the 2nd, and in having more prominent apical sculpture. A. unilamellaris has a more protruded spire, only a single parietal lamella, and is slightly smaller in size.
Description. Shell of average size, with slightly more than 4,1 tightly coiled whorls. Apex and spire slightly and evenly elevated, last whorl descending more rapidly, H/D ratio 0,522. Apical whorls slightly more than 1,25 , a little swollen, very fine microreticulation visible under 96 x magnification. Postnuclear whorls with very fine microriblets and only slightly larger radial ribs, not clearly enough differentiated for counting. Sutures deep, whorls strongly rounded above, compressed laterally with evenly rounded outer margin, umbilical margin weakly shouldered. Umbilicus relatively narrow, 'U’-shaped, regularly and slightly decoiling, contained 4-38 times in the diameter, margins shouldered. Parietal lamellae 2, extending posteriorly three-sixteenths of a whorl: upper very high, sinuately twisted posteriorly, with gradual anterior descension over anterior five-eighths until just before end when the descension accelerates; 2nd slightly lower and shorter posteriorly, more expanded above, with sharper anterior descension to point slightly beyond end of upper parietal. Columellar and palatal walls without dentition. Height of holotype 0,79 mm, diameter 1,51 mm.
Holotype. Hlonyana Bank, tributary of Tugela River, Tugela Estates, Weenen, Natal. Collected by H. P. Thomasset on 11 March 1928. Natal Museum.
Remarks. Four of the six specimens lacked any trace of a columellar ridge; one had a cord only slightly smaller than that found in A. burnupi; and one had a very small, deeply recessed trace. There was no noticeable variation in the parietal dentition.
While the type is unusual in having the narrowest umbilicus observed, in other respects it is quite typical and shows the best sculptural preservation.