ON SOUTH AFRICAN ENNExE. 65 



below the suture, and smooth beyond, except for a few irregular 

 striae occasionally extending lower, or even passing from 

 suture to suture, and the last half-whorl is regularly, similarly 

 striate all over ; aperture ovate ; peristome white and shining, 

 expanded and reflexed, and furnished with four processes, as 

 follows : a moderately large, squarish, blade-like, in-running 

 parietal plait, a large labral tooth Avidely bifurcate, the lower 

 branch being much the larger, a small tooth near the base of 

 the coluuiellar lip, and a columellar plait, wholly internal and 

 bearing a conspicuous, strengthening transverse rib. 



Height 4-46, width 2-07 mm. 



Hab. — Maritzburg, Natal, typical ; and, aberrant, Notting- 

 ham Road (Taynton) and Rosetta (Hickey, per Ponsonby). 



The axial perforation is very narrow and is easily over- 

 looked ; from it a branch passes at right angles into the 

 strengthening rib of the columellar plait. The process within 

 the labrum, originally described as two simple teeth, is, I think, 

 better considered as one bifurcate tooth, as the two points 

 spring from a common base, which is indicated on the outside 

 by a single depression. The bifurcations, being solid, appear 

 in this cavity as two white porcellaneous spots. The basi- 

 columellar tooth is barely excavated, and also appears as a 

 white porcellaneous spot behind the peristome. 



The dimensions given in the original description seeming to 

 indicate a shell of smaller size and much narrower form than 

 this species usually assumes, and not agreeing with the pro- 

 portions of the original figure, Mr. Robson has kindly re- 

 measured the type very carefully for me, and finds that its 

 dimensions are, height 3" 9, width 1*8 mm., almost exactly of 

 the same relative proportions as the type of the new figure, 

 but considerably smaller. On finding the emended dimen- 

 sions so much smaller than those of any of my shells collected 

 within recent years, I looked up my earliest examples, found 

 about the same time as the type, and have picked out two 

 nearly as small, measuring respectively 4"05 x 1*83 and 3*94 

 X 1"95 mm. This difference in size between the old and 

 the new specimens might suggest that recent seasons have 

 VOL. 3, PART 1. 5 



