212 PUPILLA, AFRICA. 



but false as the figures are, they seem better than the descrip- 

 tions. Both are reproduced below, the figures by photog- 

 raphy. In most cases the teeth were not all seen, or were 

 described and figured incorrectly. 



All of the following forms have been considered synonyms 

 of P, fontana by Melvill and Ponsonby in their last paper 

 (1908) on the subject. Burnup (1911) writes: "Of the eight 

 forms consigned to the synonymy, I have seen well-authenti- 

 cated specimens of four only, viz., amphodon, elizabethensis, 

 endoplax, and frustUlum; and I agree with the authors that 

 these names cannot stand. Of the remaining four, viz., 

 charybdica, custodita, kercea, and omicronaria, having seen no 

 representatives, I can offer no opinion ; but I am prepared to 

 accept their views. ' ' 



Pupa custodita. PI. 16, fig. 14. Shell umbilicate, obese, 

 cask-shaped, minute, thin, brown, whorls 6, ventricose, very 

 closely, longitudinally, delicately striate; aperture ovate; 

 peristome white, reflected, provided with 5 internal teeth, one 

 parietal, one columellar, three labial. Length 3, width 1.5 

 mm. Pretoria. 



Much the same in ventricose tumidity of whorl and super- 

 ficial appearance to the P. psichion just described, but entirely 

 differing in the internal armature of the mouth, which, appar- 

 ently simple externally, is really guarded within by no less 

 than five teeth, three of these being labial, one sutural, and 

 one columellar. It is a highly interesting species, and seems, 

 though of the fontana group, to bear no very direct resem- 

 blance to hitherto described species (M. & P.}. 



Pupa omicronaria. PL 16, fig. 9. Shell minute, cylindric, 

 straight, brown; whorls 7 (in one specimen 8), ventricose, 

 very finely longitudinally striate, the striae oblique ; aperture 

 ovate-rotund; peristome pale, simple. Length of largest 

 specimen 3, width 1.5 mm. Pretoria. 



This shell comes next to our P. quantula, and may perhaps 

 eventually turn out to be a variety of that species. The 

 mouth, however, is rounder and the form a little less cylin- 

 drical (M.&P.). 



Pupa kercea. PI. 16, fig. 10. Shell very minute, brownish, 

 cylindric ; whorls 6, straight, longitudinally delicately striate ; 

 aperture ovate; peristome pale, reflected, provided with one 

 sutural tooth within. Length 2.15, width 1 mm. Pretoria. 



