THE NAUTILUS. 139 



where the soil probably receives considerable lime from the lime- 

 stones further up the slope. Altitude 7,000 feet. The snails were 

 hiding under rose, sage and other brush, but not hard to find. The 

 colony extended over the whole slope, but individuals were scarce in 

 the aspen and scrub-oak groves. Throughout the whole region I 

 have not found the snails abundant on the non-calcareous formations- 



( To be concluded.} 



A REVISION OF THE ANCYLI OF SOUTH AFEICA. 



BY BKYANT WALKER. 



Several months ago Messrs. H. C. Burnup of Maritzburg, Natal, 

 John Farquhar of Grahamstown, Cape Colony, and John Ponsonby 

 and M. Connolly of London, placed in my hands for examination a 

 large collection of the Ancyli of South Africa. In order that the 

 results of the investigation might be available for immediate use 

 elsewhere, the following summary has been prepared. A fully illus- 

 trated report with complete bibliographic references, comparative 

 remarks, etc., is in preparation and will be published in the immedi- 

 ate future. 



The region included in the report is bounded on the north by the 

 Zambesi and Kunene rivers. 



Genus ANCYLUS Geoffroy. 



Section Bumupia n. sec. 



Shell dextral ; apex punctate, in a more or less radial pattern. 



Type : Ancylus caffer Krauss. 



I. Ancylus caffer Krauss. 



1848. Ancylus caffer Krauss, Sudafr. Moll., p. 70, pi. 4, fig. 13. 

 1859. Ancylus gaulus Gould, Pr. B. S. N. H., VII, p. 40. 

 Type locality : (cctffer^, Pietermaritzburg, Natal. 



(yaw/ws), Cape of Good Hope. 



Also : Umkomaas ; Imputyni stream near Maritzburg ; Inkwalini 

 stream near Maritzburg ; Tongaat ; and Equeefa River, Natal 

 (Burnup). 



Var. nanus n. v. 



Shell smaller than typical caffer, proportionately shorter and 



