species and Varieties o/Pupa. \01 



case where the latter occurs, the description in the Survey 

 seems sufficiently to describe the species. 



The dimensions of the shell depicted in the figure are : — 

 PTeight 2'06, width 0*87 mm. ; the smallest apparently mature 

 specimen that I have measured being 1-67 high and 0'8I m:n. 

 wide, and having only about 6^ whorls. 



Var. livingstonce, Burnup. 



A new locality may be recorded for both the typical form 

 and the var., viz. Stander's Kop, Transvaal {Connolly). 



The type of the var., said to be in my collection, has since 

 been transferred to the British Museum with the types of the 

 other new forms described in the Survey. Its dimensions 

 are:— 'Height 2-02, width 0-84 mm. 



12. Pupa lai/ardi, Benson. (PI. X. figs. 3, 4.) 



The fig. presented by Melv, & Pons, does not express the 

 detail with sufficient accuracy for the purposes of comparison ; 

 I therefore take this opportunity of offering new figures for 

 comparison with those of 7 layardl, var. minora Bens. 

 (?=P. stoaphora, Bens.), and P. crawfordiana (11. & P.) on 

 same plate. 



The shells chosen for my illustrations do not include that 

 figured by Melvill and Ponsonby, though Mr. Ponsonby 

 kindly laid his shell at my disposal for the purpose. They 

 are chosen from a series collected at Hermanns, Caledon 

 Division, in the Cape Province, by Mr. R. M. Lightfoot, as 

 being fresher shells than his, free from extraneous matter in 

 the aperture, and more nearly approaching the size and 

 proportions of Benson's type. In all essential characters 

 they agree closely with the shells given to Mr. Ponsonby by 

 Mr. Benson. 



Since the peristome is not at all thickened at the edge, but, 

 on the contrary, is remarkably thin and brittle, the lips are 

 invariably more or less chipped. One of the most conspicuous 

 differences between the present species and P. crawfordiana, 

 M. & P., is the absence from the latter of the trumpet-like 

 extension of the peristome observable in the former. 



The dimensions of the specimens here figured are as 

 follows : — 



Fig. 3. Height 7-87, width 3-26 mm. 



Fig. 4. „ 7-87, „ 3-67 „ 



The shells of this species may be either white or horn- 

 colour, and the position of the seventh peristomatal process, 



