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Transactions of the Royal Society of South Africa. 
of first caudal segment 9, of second segment 11, of third segment 10"5, of 
fourth segment 11-8, of fifth segment 11-2, of vesicle 9*75, of hand-back 
18*25, of movable finger 16. 
This is presumably very closely related to dentatus. 
H. GRANULATUS Purcell (PI. XXXI, fig. 91), Ann. S. Af. Mus. ii, p. 204 
(male), 1901. 
Distribution : The type was labelled " Rustenburg district." I have 
briefly described what seems to be a female of this species from Wankie,. 
South Ehodesia (21), and we have also two female examples from Tsessebe 
Siding (E. C. Wilmot). The pectinal teeth of the former are 15, 16, and 
of the two latter specimens 17-19. 
The Tsessebe specimens also differ from the Wankie female in the rather 
shorter and stouter tail, the measurements of the larger specimen being as 
follows : Length of carapace 19*6, of tail 76'5, of first caudal segment 8*6, of 
second segment 13, of third 12*8, of fourth 15, of fifth 15*5, of vesicle 10*6; 
posterior breadth of first caudal segment 4*4, height of same 4 ; breadth of 
last tergite 16*2, length of same 12. The superior crests of the fourth and 
fifth caudal segments are fairly strongly denticulated, but rather weakly and 
more nimierously so in the Wankie female ; a similar difference obtains with 
regard to the inferior crests of the fifth segment. 
The last tergite is distinctly broader in Tsessebe specimens, being about 
as long as broad in the Wankie female. Judging from the locality datar 
the Tsessebe specimens are probably more nearly typical, whilst those from 
Wankie seem to represent a slender-tailed variety of the species. 
One of the marked features of granulatus is the large size of the vesicle 
and the comparatively coarse granulation and roughness of its surfaces ; the 
superior crests of the second and third caudal segments in the female are only 
weakly denticulated, and the terminal tooth, though enlarged, is not subspini- 
form ; the anterior margin of the carapace is straight in female examples, 
very shallowly emarginate in the Wankie male. 
An adult male example in the Rhodesian Museum has only 19 pectinal 
teeth. 
H, BicoLOR Purcell (PL XXXI, figs 88 and 89), Ann. S. Af. Mus. i, p. 437 
(female), 1899. 
The type was found 20 miles east of Pietersburg. The Transvaal 
Museum has 2 adult female examples from Woodbush. 
The Albany Museum possesses an adult male from Doornkop, near Belfast 
(E. Gerhardt), which I think must be referable to the same species. It is 
characterised by an unusual shortness of the tail, the first segment being 
stout. The other characters are as follows : Anterior border of carapace 
moderately but not deeply excavated ; last sternite distinctly broader than 
