410 Mr. H. C. Burn lip on South- African 



Survey, is tlie only specimen of this species tliat I have 

 seen. Its nearest ally seems to be P. dysorata, M. & P., which 

 it strongly resembles in its remarkably cylindrical form, but 

 from which it may easily be distinguished by its greater 

 length, comparative narrowness, rounder aperture, and much 

 finer sculpture. 



18. Pupa sr/kesi, M. & P. 

 Var. inconspicua, Burnup. 



Although, while differentiating inconspicua from syhesi, 

 M. & P., from the material then at my disposal, I considered 

 it to be a distinct species, I can now only concur with Melv. 

 & Pon?!. in treating them as one. In coming to this decision 

 I am largely indebted to Dr. R. Sturany, who not only iden- 

 tified for me specimens from Dukuduku Forest, Zululaud, 

 as being P. pentheri, Stur., but also sent me co-types of his 

 species collected by Dr. Penther at Umbilo Road, Durban. 

 His specimens are somewhat intermediate between sykeai, 

 M. & P., and inconspicua, Burnup, and leave no doubt as to 

 all three forms belonging to one species. P. pentheri must 

 therefore be placed in the synonymy of sykesi, and incon- 

 spicua may be retained as an elongate, narrow, fusiform 

 variety of the same species. 



In adopting my description of the var. incow^picica in its 

 entirety to represent their species, Melvill and Ponsonby are 

 led into certain errors, in that their type is more conic and 

 less fusiform than the var., and has only about 6| whorls 

 instead o£ 7^, wliile the aperture is more than, instead of 

 nearly, ^ of the height of the shell ; besides which the dimen- 

 sions given do not refer to the type, which measures : — 



Height 1-82, width 0-83. ^ 



It may be noted that while the height of inconspicua is 

 greater than that of the type, the width is less. As this 

 attenuate form has so far only been met with at Dargle, it 

 may well be a local race. 



19. Pupa tahularis, M. & P. 



The dimensions of the figured specimen, which is in 

 Mr. Ponsonby's collection, are not given in the Survey. 

 They are as follows: — 



Height 3-63, breadth 1-88 mm. 



20. Pupa tetrodus, Bttg. 



1870. Pupa tetrodus, Bttg. Ber. Offenbach. Ver. Naturk, xi. p. 46, 

 pi. i. figs. 1 rt-c. 



