178 Annals of the South African Museum. 



up and thickly covered with numerous, close- 

 set, coarse granules. Terminal tarsi of last 2 

 pairs of legs with 0-1 (very rarely 2) external 

 spines below, in addition to the 4 on the outer 

 terminal lobe. Upper surface of hand densely 

 covered with not very coarse granules, which 

 are mostly more conical and isolated. Last 

 abdominal segment below very densely graimlar 

 (about 18-30 irregular transverse rows may be 

 roughly counted between anterior and posterior 

 margins in the mesial part), sometimes the 

 mesial part merely roughened with numerous 

 transverse furrows and pits. North-east of 

 Cape Colony, Bechuanaland, Transvaal, 

 Rhodesia <? 0. ylabrifrons, Pet. 



b 1 '. Inferior median crests of first 4 caudal seg. 

 merits very distinct (the space between them in 

 segment 1 sometimes filled up with coarse 

 granulation in pugna.r). Tarsi of last 2 pairs 

 of legs with 1-2 external spines below in 

 addition to the 4 on the outer terminal lobe. 

 Granulation of upper surface of hand much 

 coarser (at least in proportion to the size of the 

 hand). 



a 18 . Inferior median keels of I. caudal segment 

 composed of a series of (5-10 coarse or very 

 coarse granules, the space between the 

 keels sometimes filled up with equally 

 coarse granulation, rendering the crests 

 indistinct. Ventral surface of last abdo- 

 minal segment coarsely or very coarsely 

 granular (about 6-12 irregular transverse 

 rows may be roughly counted between 

 anterior and posterior margins in the 

 mesial part). East of Cape Colony, Natal 



(teste Pocock), Transvaal 



<? 0. piiqnax, Thor. 



Inferior median keels of I. caudal segment 

 smooth, crenulated or granular, the 

 granules then more numerous. Mesial 

 part of last abdominal segment smooth or 

 finely roughened, or covered with fine and 

 much more numerous granules. 



r/". Upper surface of carapace densely 

 granular, the granules on the inter- 

 ocular area generally as well formed 

 and as large as those on the sides and 

 coarser than those at the hind angles 

 (the interocular area sometimes nearly 

 smooth on the convexities behind and 



