240 Mr. E. I. Pocock on the Species of 



Although this species is nearly allied to 0. glabr if rons, it 

 may be distinguished, as Kraepelin has pointed out, by its 

 more coarsely and thickly granular terga, by the ornamsnta- 

 tion of the hand, which is less granular and composed rather 

 of low anastomosing tubercles, by the constancy of the occur- 

 rence of either one or two spines external to the series running 

 along the lower surface of the third and fourth tarsi. In the 

 male, too, the interocular area of the carapace is finely 

 granular throughout and the keels on the hand are stronger. 

 The colour, too, is on the whole darker, and in the specimens 

 that 1 have seen the maxillary processes of the first and 

 second pairs of legs, as well as the tip of the sternum, are 

 black, while these same skeletal pieces in glabr if rons are 

 uniformly pale. 



Opisthophthalmus granifrons, sp. n. 

 (PL X. figs. 1-16.) 



No. 1, type (?, dry specimen). — Colour mostly ochre- 

 yellow ; postero-lateral portion of carapace darker than the 

 interocular area ; mandibles black, granules forming the crests 

 on the chelae also black ; maxillae of the first and second legs 

 lightly infuscate at the tips. 



Carapace considerably longer than wide, as long as the 

 first and second caudal segment and half the third ; its inter- 

 ocular area coarsely granular in its anterior half, nearly 

 smooth behind ; sides of the carapace coarsely granular, espe- 

 cially on the edge bordering the interocular area; the median 

 eyes very far back, less than a quarter of the length of the 

 carapace from the posterior border; the median groove 

 distinctly forked in front. 



Terga granular at the sides, the posterior ones becoming 

 gradually more and more granular along the hind border, the 

 seventh granular throughout; the third to the. sixth with a 

 smooth longitudinal ridge, the seventh with a low median 

 elevation, but showing scarcely a trace of lateral crests. 



Sterna smooth and polished, the last with a few low 

 granules in the middle of its area. 



Tail of medium length, slender; the upper crests of seg- 

 ments 2 to 4 ending in an enlarged spiniform granule ; the 

 inferior median keels practically obsolete upon segments 1 to 

 3, though just visible on 2 and 3, weakly granular on the 

 fourth ; the infero-lateral keels obsolete on the first, which 

 is polished and scarcely granular below ; these keels distinct 

 on the third and fourth and marked with black pigment. 

 Vesicle and fifth segment as in 0. capensis. 



