FAUXULUS. 235 



geographic problems of Africa ; the few other South African 

 Pupillids having Oriental or American affinities. 



The presence of two pairs of tentacles has been ascertained 

 by Mr. Burnup in F. ponsonbyanus and F. mcbeanianus. 



Part of the species of Fauxulus have been ably discussed 

 and the difficult ones figured by Mr. H. C. Burnup, whose re- 

 sults have been utilized and often quoted herein. I have not 

 seen F. crawfordianus, F. fryanus, F. pereximius or the 

 typical form of F. glanvillianus, all of which appear to be 

 known only by the original examples. Messrs. Burnup and 

 Farquhar and Maj. Connolly have kindly assisted with 

 specimens. 



The species fall into three strongly characterized subgenera, 

 defined in the following 



Key to Subgenera and Species of Fauxulus. 



a. Only the angular lamella emerges to the, lip edge, the 

 other teeth being placed distinctly deeper; spire rather 

 thick ; sinistral. Subgenus FAUXULUS, s. s. 



&. Lip hardly expanded; 5 teeth, no basal plica; in- 

 terior ochraceous. F. capensis, no. 1. 

 fc 1 . Lip strongly expanded; 8 or 9 teeth, suprapalatal, 

 basal and subcolumellar being developed (section 

 Fauxulella) . - F. pamphorodon, no. 2. 

 a 1 . Angular lamella and upper palatal plica emerging to lip 

 edge; spire slender above; peristome expanded through- 

 out. Subgenus TOMIGERELLA. 

 ~b. Peristome not free above; no lamella between pari- 

 etal and columellar; dextral. 



F. crawfordianus, no. 3. 



& 1 . Peristome free throughout; a small lamella in the 

 angle between parietal wall and columella. 

 c. Dextral; rimate; 8 to 9y 2 whorls. 



d. Length 8 to 9% mm. F. layardi, no. 4. 

 cZ 1 . Length 5% to 7 mm. 



F. I. stoaphora, no. 40. 



c 1 . Sinistral; deeply umbilicate; length 8, diam. 

 3 mm., 12 whorls. F. fryanus, no. 5. 



