ON SOUTH AFRLOAN ENNE^. 



35 



width to height, though to me cylindx-ica seems per- 

 ceptibly naiTOwei'. The following table of dimensions of a 

 few shells that I have measured will indicate the futility of 

 any attempt to identify a variety based on size and form 

 alone. 



The ratios given in the fourth column show great variability 

 even in specimens from the same locality, e . g. Ntimbankulu. 



Var. discrepans Stnrany. PI. Ill, figs. 2, 3. 



Ennea isipingoensis Stiir. var. discrepans Stiir.. Anz. k. Akad. 



Wissenscli. Wien (1898), No. xvi, p. 157 (reprint j). 5) ; Sturany, 



Sixdafrik. Moll. (1898), p. 27, pi. i, fig. 20. 

 Ennea isipingoensis Stur. var. simillinia Stu7\, Anz. k. Akad. 



Wissensch. Wien (1898), No. xvi, p. 157 (reprint p. 5) ; Sturany, 



Slidafrik. Moll. (1898), p. 27, pi. i, fig. 21. 



Shell like E. isipingoensis, typical, but with the following 

 differences : The contour is more oval and less cylindrical ; 

 the aperture is larger and rather oblique and triangular ; the 

 processes of the aperture are similarly placed but differ in the 

 following respects : The labral plait is much enlarged, being 

 both longer and wider, and bears a distinct, though minute, 

 denticle on the upper edge ; the minute basal denticle is 

 replaced by an inconspicuous, scarcely raised, minute ridge. 



