140 Transactions of the Royal Society of South Africa. 
and apparently constantly so, yet the variation met with in the two groups 
throughout their respective areas of distribution is such that the two 
extremes are to a considerable extent linked together by intermediates, and 
may become difficult to draw a sharp line between the two groups. 
The following measurements are based on large specimens from Newing- 
ton. East Transvaal : Total length, M. 110, F. 107 ; length of carapace, 
M. 16-2, F. 19; breadth of same, M. 14, F. 17-3; distance of eyes from 
anterior edge of carapace, M. 11, F. 12*5 ; width of hand, M. 10-6, F. 14-4; 
length of handback, M. 8*5, F. lO'l ; length of movable finger, M. 16, 
F. 19-6 ; length of humerus, M. 11*4, F. 12'4; length of brachium, M. 11-5, 
F. 12-4 ; length of tail, M. 57*6, F. 56 ; width of first caudal segment, 
M. 6-75, F. 7; width of fifth caudal segment, M. 5, F. 5 ; length of fifth 
caudal segment, M. 12-5, F. 12-5 ; length of vesicle, M. 13'5, F. 1475. 
31. 0 MACER Thorell, Actes Soc. Sci. Nat. Ital. 1877, vol. 19, p. 236 (male). 
Distribution: Purcell (15) says: "Along the south coast from False 
Bay eastwards as far as Port Elizabeth, and probably further ; northwards 
the species extends along the Langeberg range into the divisions of 
Worcester and Ceres." I doubt if this species occurs eastwards of Port 
Elizabeth, and Pocock's Zululand record (5) should be confirmed. It was 
given on the evidence of a specimen collected by Gr. F. Angas, who, how- 
ever, collected in Western Cape Colony as well as Zululand. 
32. O. LATiMANus Koch, Die Arachniden, VIII, p. 65, fig. 640 (female), 
1841. 
With this species I now unite pugnax Thor., and it may perhaps be 
necessary to include macer Thor. also, for the range of variation within the 
species latimanus, as now enlarged, is very great. 
A short description of both sexes of the typical form has been given 
by Dr. Purcell (15). The following additional notes are based on our 
specimens : 
0. latimanus var. typicus (PL XXII, fig. 37, and PI. XXIV, fig. 51). 
Tergites in the male finely shagreened ; in the female, excluding the last 
tergite, they are often smooth and shining to a considerable extent, though 
coarsely sculptured and pitted, or they may be entirely roughened and 
granulated, coarsely so in their posterior portions ; last sternite of the male 
usually with numerous comparatively small, closely packed granules ; some- 
times, however, these are sparsely scattered, sometimes granules as such 
are practically absent, the surface being strongly plaited transversely or 
thrown into low wavy ridges or even more or less irregularly rugose ; of 
female sometimes quite smooth mesially, but usually roughened, granulated, 
or tubercled and coarsely pitted, and often showing the 4 keels ; first 
i 
