170 Annals of the South African Museum. 



Adult Females (recently killed, in spirit*). 



The female shows the following differential characters : 



Carapace truncated or widely sinuate in front, scarcely shorter 

 than the first and second caudal segments (measured along the 

 sides). 



Terga. Segments 1-6 smooth, granular only at the sides, 

 segment 7 smooth anteriorly. 



Sterna smooth, finely granular only at the extreme lateral borders, 

 the last segment somewhat weakly granular, but much less densely 

 so than in the male. 



Cauda scarcely weaker than in the male, long, 3f times as long as 

 the carapace ; infero-lateral keels almost smooth or weakly crenu- 

 lated in anterior segments ; granulation of the under surface of the 

 first two caudal segments like that of the last abdominal segment ; 

 fifth caudal segment very long, its length (measured along the side) 

 a little less than that of the carapace (by about 1-J-- 2 mm.) ; vesicle 

 very much shorter than the fifth segment. 



In 0. karroocnsis the cauda is about 3-3^ times as long as the 

 carapace in the female, the fifth caudal segment is much shorter 

 than the carapace (by about 3 mm.), and the vesicle is distinctly 

 longer than the fifth segment. 



Palps. Humerus much shorter and stouter, much shorter than 

 the fifth caudal segment (in karroocnsis the humerus is longer than 

 the fifth caudal segment). Hand less hairy, very stout, its width 

 considerably exceeding the length of hand-back ; the upper surface 

 strongly convex, not flattened, nearly smooth. 



Opercnlum cordate, slightly broader than long, not cleft longitu- 

 dinally. 



Pectincs extending a little beyond coxae, with 15-17 teeth, the 

 scape free of teeth at base for about % of its length. 



Measurements in Millimetres. Total length 120 ; length of carapace 

 16 J, width 16 ; distance of eyes from anterior margin 12 ; length of 

 humerus 12 ; width of hand 12 ; length of hand-back 9f , of movable 

 finger 16, of tail 63, of fifth caudal segment (measured along the 

 side) 15, of vesicular segment 12 ; width of first caudal segment 6^, 

 of fifth 41, of vesicle 5J. 



Locality. (a) Types : 4 3 (3 ad.) and 5 $ (4 ad.) from Naroep, 

 Great Bushmanland (Max Sclilechter}. 



Further localities are : 



(b) 1 ad. 3 from AYortel, near Naroep (Max Schlechter). 



(c) 1 juv. 3 from Hunitsamas, near Eamond's Drift on the Orange 

 River, Bushmanland. 



