Opistlio[)lillialiiui.s in (he Britit<h Miiseiiin. 211 



Chehe. — All the crests on the liumerus coarsely granular, 

 the upperside of the segment sparsely granular, its anterior 

 edge strong and granular ; the upper ridge on tlie brachium 

 coarsely granular ; hands convex above and thickly covered 

 with low round granules ; the keels weak, the finger-keel 

 consisting merely of a vow of black granules, the secondary 

 keels also weak, though defined witli black lines ; the upper 

 keel of the hand-back distinctly granular ; hands wide, with 

 strongly convex denticulated inner edge. 



Legs with lower edge of anterior femora denticulate; tarsi 

 of fourth leg with a single row of spines below, of third 

 with a single anterior or external spine as well ; the sids-lobes 

 longer than the superior median process. 



Genital operculum heart-shaped, as long as broad. 



Pectines with 14 teeth ; tlie basal intermediate lamella long, 

 as in 0. Wahlbergi. (PI. X. fig. 1 a.) 



Measurements in millimetres. — Total length (abdomen con- 

 tracted) 79 ; length of carapace 13'5 ; distance of eyes from 

 anterior edge 10 5; width of carapace 12 ; length of tail 42 ; 

 width of iiand 10; length of hand-back 8, of movable 

 finger 11 "5. 



Log. '' The Cape " {Kei/serling Collection). 



No. 2, (^ . — A specimen (also dry) that I believe to be 

 the male of this species presents the following differential 

 characters: — 



The carapace only slightly exceeds the first two caudal 

 segments in length ; the side-edges of the interocular area 

 defined by strong granules. 



Terga more thickly covered with granules. 



The fir.st ahdominal sternite is smooth, the second granular 

 posteriorly and laterally, the third more granular than the 

 second and the fourth than the third, the filth entirely covered 

 with squamiform granules, as also is the lower surface of the 

 first caudal segment. Lower surface of second and third 

 caudal segments sparsely granular and weakly keeled. 



Hands much narrower than in female (c/l measurements), 

 but the granular crests rather more strongly expressed. 



[Pectines absent.) 



Two external spines on lower surface of tarsus of third leg. 



Measurements in millimetres. — Total length 108 ; length 

 of carapace 15, width 13; distance of eyes from front 

 margin 11; length of tail 62; width of hand 9; length of 

 hand-back 8'5, of movable digit 15 5. 



Loc. S. Africa [Dr. Smith). 



