Species and Varieties of Pupa. 415 



2Q. Pupa {Fauxidus) pereximia (M. & P.). 



27. Pupa (Fauxulus) ponsonhi/ana (Morelet). 

 (P!. X. figs. 9-12.) 



As Morelet^s description and original figure* do not clearly 

 define the positions, nor even the number, of the peiistomatal 

 processes with distinctness, and, moreover, liis figure, if cor- 

 rectlv drawn, depicts an imperfect shell with the edges of 

 the peristome chipped off, a new series of figures is here 

 offered, which it is lioped will define the species sufficiently 

 clearly to obviate the necessity of revising the description. 

 The figures are drawn from four shells from Graharnstown, 

 kindly supplied to me by Messrs. Ponsonby and Farquhar, 

 and show to some extent the variability in size and general 

 form of this very interesting little species. The measure- 

 ments of a few other shells are given, below the dimensions 

 of the figured specimens, showing the extremes of such shells 

 as I have examined. 



Fig. 9. Height 3-13, width 1-71 mm. 

 „ 10. „ 3-05, „ 1-43 „ 

 „ 11. „ 2-97, „ 1-55 „ 

 „ 12. „ 2-81, „ 1-43 „ 

 Dimensions of a few other specimens :— 

 Height 3-52, width 1-52 mm. 

 „ 3-59, „ 1-86 „ 

 „ 3*33, „ \' i'6 ,, 

 „ 2-84, „ 1-42 „ 

 „ 2-74, „ 1-43 „ 

 The crown of little hairs about the middle of the last 

 whorl, referred to by Ancey [Journ. de Conch, vol. xlix. 

 (1901) p. 141], arises in the peripheral sulcus and extends 

 upwards in the suture, but the liairs are very easily rubbed 

 off. They are not shown in the figures, because washing, so 

 necessary to obtain a clear view of the peristomatal processes 

 and a correct estimate of the depth of the sculpture and 

 suture, has removed every vestige of the hairy coronet. I 

 have examined many specimens and have found the number 

 of peristomatal processes, in addition to the two parietals, to 

 be invariably seven. 



So far I have only collected two specimens in Natal (at 



* Journ. de Conch, vol. xxxvii. (1889) pp. 9, 10, pi. i. fig. 5 [Pupa 

 {Faula) ponsonby ana, Morelet]. 



