20 Annals of the South African Museum. 



black granules, slightly larger than the others ; finger-keel strong, 

 nearly smooth, often interrupted in the proximal part. 



Operculum cordate, slightly broader than long, deeply ernarginate 

 behind, but not completely cleft longitudinally. 



Pectines with 8-12 teeth, scape free of teeth at base for about 

 two-fifths of its length. 



Measurements in Millimetres. Total length 100 ; greatest length 

 of carapace 14-J- ; width of carapace 13i ; distance of eyes from 

 anterior median edge 10 ; width of hand 10^ ; length of hand-back 

 8, of movable finger 12, of tail 49 ; width of first caudal segment 5^-, 

 of fifth caudal segment 3-J-. 



Four adult males, 6 adult females, and 11 young of both sexes 

 from Clanwilliam (C. L. Lclpoldt}. 



This species is closely allied to 0. granifrons, being intermediate 

 between granifrons and capcnsis. 



OPISTHOPHTHALMUS FUSCIPES, n. sp. 

 Female (recently killed, in alcohol). 



Colour a deep rich reddish brown ; the terga, with the exception 

 of a band along the posterior borders, and the carapace along the 

 lateral borders of the interocular area nearly or quite black ; the 

 mandibles, the fingers, the crests of palps and of under side of 

 cauda and the maxillary processes of second pair of legs black ; 

 the posterior surface of legs, the under side of hands and brachia, 

 and often also the interocular area and the inner basal portion of 

 the upper surface of hands lighter in colour ; under side of first 

 caudal segment and of last abdominal sternite with four black 

 lines, which are sometimes confluent and are continuations from 

 the four black keels of the second caudal segment. 



Carapace longer than wide, as long as the first and second caudal 

 segment and half the third ; the anterior edge between the eyes and 

 the triangular area with a row of hairs, but otherwise nearly smooth 

 and straight ; the median groove deep, distinctly forked in front ; 

 interocular area coarsely granular in its anterior half, weakly 

 granular or nearly smooth behind ; sides of the carapace coarsely 

 granular, especially along the borders of the interocular area ; 

 median eyes one-third, or slightly less than one-third, of the length 

 of carapace from posterior border. 



Terga granular and shiny, the anterior and the mesial portion in 

 the front segments and the anterior median region in the last seg- 

 ments but one, very finely granular or only slightly roughened ; 

 longitudinal keel of segments 2-6 smooth throughout or finely 



