234 PAUXULUS. 



normal Pupillid type, all of the 

 laterals bicuspid. Granopupa. 



e 2 . Shell larger (5 to 10 mm. long, 

 61/2-12 whorls), transparent brown 

 or dark brown (but in the section 

 Solatopupa, type B. similis Brug., 

 opaque-whitish) ; teeth of the mid- 

 dle field of radula narrow and 

 unicuspid. Chondrina. 



Genus FAUXULUS Schaufuss. 



Faula H. & A. ADAMS, Genera of Eecent Mollusca, ii, p. 

 171, 1853, for Pupa capensis, kurri, muhlfeldti, potteber- 

 gensis. Not of Blanchard, 1850. MARTENS, Die Heliceen, 

 1860, p. 298, type Pupa capensis Kurr. Fauxulus SCHAU- 

 FUSS, in Paetel, Molluscorum System et Catalogus, 1869, p. 15 

 (substitute for Faula, H. Adams). 



The shell is rimate or perforate, cylindric with conic sum- 

 mit or acutely ovate-conic, of many (iy 2 to 12) narrow 

 whorls, the last built forward. Aperture provided with at 

 least 5 teeth in the typical positions angular, parietal and 

 columellar lamellae, upper and lower palatal plicae ; often with 

 secondary lamellae and plicae ; the angular and parietal lamel- 

 lae are distinct and subparallel. Animal with both ocular and 

 inferior tentacles. 



Type F. capensis. 



Distribution, South Africa, in Cape of Good Hope and 

 Natal Provinces. The typical species lives on plants, but the 

 others seem to be ground snails. 



Fauxulus groups with the European genera Abida, Chon- 

 drina and Odontocyclas. The resemblance might be thought 

 a case of convergence rather than affinity were it not that 

 most other South African Pupillidae belong to the European 

 genera Truncatellma, Lauria and PupHla. The correspond- 

 ence of Fauxulus with Abida and its allies, both in form and 

 apertural characters, is remarkably close. The presence of 

 these Pupillidae of Palaearctic type in a fauna for the greater 

 part so utterly diverse in origin is one of the perplexing zoo- 



