140 THE NAUTILUS. 



broader, being obovate rather than oval ; apex less depressed ; dark 

 brown. 



Length 4.5, width 3.5, alt. 1.75 mm. 



Type locality : Karkloot' stream, Natal (Toynton). Also : 

 Maritzburg, Natal (Ponsonby). 



Type, No. 36002, coll. Walker. 



Var. gordonensis Melv. and Pons. 



1903. Ancylus (Ferrissia) gordonensis M. and P., A. M. N. H., 

 xii, p. 606, pi. xxxi, fig. 2. 



Type locality : Gordon Falls, near Pietermaritzburg, Natal. Also, 

 Edendale Falls, Umzindusi River ; Howick Falls, Umgeni River ; 

 Nottingham Road ; Town Bush Valley stream, Maritzburg ; Sweet- 

 water stream near Maritzburg ; Aarvogel Krantz, Umgeni River ; 

 Dargle, Umgeni system (Burnup); Karkloof stream (Burnup and 

 Morton) and Umgeni River, Natal (Ponsonby); Zoutspansberg, 

 Transvaal (Cragoe). 



Var. farquhari n. v. 



Much smaller than typical gordonensis, to which it is most closely 

 allied ; thicker and darker ; apex more prominent, but scarcely at all 

 depressed. 



Length 4.8, width 3.75, alt. 2 mm. 



Type locality : York, East Griqualand (Farquhar). Also, Teko 

 River, Transki (Hickey). 



Type, No. 36003, coll. Walker. 



Var. stenochorias Melv. and Pons. 



1903. Ancylus (Ferrissid) stenochorias M. and P., A. M. N. H., 

 xii, p. 607, pi. xxxi, fig. 1. 



1853. ? Ancylus obliquus Krauss, in Kuster Con. Cab., Ancylus, 

 pi. 1, figs. 18-20, non Brod. and Sby., 1832. 



1882. ? Ancylus caffer Clessin, Con. Cab., Aucylus, p. 36, pi. 1, 

 figs. 18-20. 



1889. ? Ancylus caffer Morelet, J. de Con., xxvii, p. 20. 



Type locality: Ebb en Vloed, Port Elizabeth, Cape Colony. 

 Also, Van Staden's River and Bog Farm, Port Elizabeth (Pon- 

 sonby); Bakken's River, Port Elizabeth (Farquhar); Upper Retreat 

 and Klipplatz River, Cathcart (Ponsonby); Kaiser River, Montagu 

 (Connolly); King William's Town Road Dam and Kowie River, 

 Grahamstown (Farquhar). 



