160 Annals of the South African Museum. 



In the female the interocular area is either entirely smooth or the 

 anterior half is roughened or very minutely granular ; the second to 

 sixth segments of the terga are very uneven hut shiny, coarsely 

 granular along hind margin and provided each with a smooth, 

 longitudinal keel and with a large transverse elevation on each 

 side ; the last segment of the sterna is distinctly keeled, its surface 

 roughened (also in the middle) with irregular pits and elevations and 

 generally furnished at the sides with a few granules ; the median 

 inferior keels of the first caudal segment are well developed, nearly 

 smooth or more or less crenulated ; the finger-keel is either nearly 

 smooth, or it is hroken up into a row of granules. 



The male of latiinauiif;, which has not as yet been described, 

 differs from the female in the following characters : Carapace only 

 slightly longer than the first two caudal segments, the interocular 

 area almost entirely covered w r ith the minutest granules ; tcrija 

 finely shagreened without any shiny elevations ; sterna with the 

 first four segments finely roughened and often pitted in the middle 

 (rarely the first segment nearly smooth), the fifth segment finely 

 granular in the middle, more coarsely granular at the sides, keeled ; 

 inferior keels of first caudal segment always granular ; the scape of the 

 pcctincs rectangular at the base and toothed throughout its length ; 

 upper and anterior surfaces of Ji inner us separated by a crest of 

 larger granules ; hand much smaller and relatively narrower, the 

 inner part of the upper surface covered with granules which are not 

 so flat but more isolated than in the 5 , resembling those on the 

 outer part of the upper surface of hand ; secondary keels generally 

 distinct and well developed, sometimes weak ; operculum much 

 broader than long, completely cleft longitudinally. 



Measurement* in Millimetres of lan/ext male. Total length 84; 

 greatest length of carapace 12f, width llf ; distance of eyes from 

 anterior margin 9 ; width of hand 9f ; length of hand-back 7i, of 

 movable finger 14, of tail 47 ; width of first caudal segment 6, 

 of fifth 4i, of vesicle 4i. 



According to Kraepelin, who examined the type specimens of 

 latimaiiKs and cairns, these two species differ solely in the possession 

 by the latter of well-developed secondary keels on the hands and a 

 fine granulation on the anterior part of the interocular area. Since 

 both these characters often occur in the females of latimanus, I am 

 compelled to consider calviis as synonymous with latimanus. 



Pocock :;: records latimanus from the Murchison Range, Transvaal, 



* Ann. Mag. N. H. (G) xvii., p. -238. 



