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Transactions of the Royal Society of South Africa. 
the nature of the tubercles on the last sternite and inferior surface of first 
caudal segment; in the Kiniberley specimen those tubercles are smaller, 
more numerous, and less ridge-like than in the Eedhouse example. 
Measurements of adult male from Kimberley and adult female from 
De Aar : Total length, M. 76*5, F. 82 ; length of carapace, M. 11-G, F. 14-25 ; 
length of hand ,M. 17-8, F. 19-8; of hand-back, M. 7, F. 8-4; of movable 
finger M. 11-2, F. 12-25 ; breadth of hand, M. 7*6, F. 11-75 ; length of 
brachium measured along upper surface, M. 8-8, F. 9.2 ; of tail, M. 44^ 
F. 44. 
16. O. LATicAUDA Purcell, Ann. S. Af. Mus. vol. i, p. 26, PI. iv, fig. 6, 1898 
(male only). 
Distribution. — This species is only known through a single male example 
believed to have come from Calvinia. 
17. O. PALLiDiPEs C. L. Koch (PI. XXII, fig. 36, and PI. XXIII, fig. 46). 
Die Arachniden, x, p. 3, fig. 757, 1843 (male). 
According to Dr. Purcell (15) it inhabits "a strip of country (with 
winter rains) along the west coast of Cape Colony, extending less than 
100 miles inland. Headquarters : Bokkeveld Mountains (Calvinia and Van 
Ehynsdorp Division), Cedarberggen (Clanwilliam Division), Piquetberg 
Range (Piquetberg Division) ; besides, stragglers are found in the whole 
territory occupied by 0. granifrons in the division of Namaqualand." 
18. 0. PEEiNGUEYi Purcell (PI. XXII, figs. 39 and 40), Ann. S. Af. Mus. i, 
p. 23 and 153, 1898. 
Distribution : The types came from Namaqualand, Cape Province, and 
Dr. Purcell subsequently recorded the species from Sneeuwkop Mountain in 
the Cedarberg range, Clanwilliam Division, at a height of over 3000 ft. We 
have specimens from Steinkopf and O'okiep (Dr. E. Howard). 
This species bears a similar relationship to pallidipes as does austerus to 
Jcarrooensis. The importance of the character of the Y-shaped groove on the 
carapace is uncertain. It may be that these four species are genetically 
related, and even that a direct close relationship may exist between austerus 
and 2^eri7igueyi or between jjallidijpes and Jcarrooensis : but on the whole the 
structure of ])eringueyi points to closer relationship with jmlliclipes than with 
any other species. 
There is a slight difference of shape in the upper surface of the 
humerus between 'pallidi'pes and ]jeringueyi in female examples ; in palli- 
di])es the anterior and posterior crests bounding the upper surface diverge 
from base to apex, whilst in i^eringueyi they are less divergent and almost 
subparallel. In our specimens the pedipalps of ])eringueyi are distinctly 
more elongated than those of pallidijjes, the humerus of the male being- 
longer than the carapace in peringueyi, shorter than the carapace in 
