170 Transactio7is of the Royal Society of South Africa. 
O. AEQUispiNus Kraepelin, Mit. a.d. Nat. Mus. Hamburg, xxviii, p. 80,. 
1911 
The type specimens were collected at Zwartberg Pass ; we have what 
seems to be the same species from Mossel Bay (Bro. J. H. Power). This 
species is closely related to asiaticus, differing therefrom chiefly in the 
smoother hands. In addition to the spine at the terminal angle of the 
fourth tarsi, the lower margins carry 3.3 or 4.3 spines ; in some immature 
specimens, instead of a spine, there is a long bristle at the terminal angle. 
The coarse granulation on the lower surface of the vesicle is feebly 
developed, whereas in asiaiicvs the granulation is strong. The legs are 
dark in our specimens, but yellow in the type. 
Eventually this form will have to rank only as a variety of asiaticus, I 
think 
O. VALIDFS Thorell (PI XXVIII, fig. 79), Actes Soc. Sci. Nat. Ital. xix, 
p. 244, 1877. 
The type was taken by Wahlberg in Caffraria, and Kraepelin has 
identified the Natal form therewith. Accepting Kraepelin' s definition of 
the species, this form seems to be confined to Natal and Zululand. We 
have it from Krantzkloof (Rev. P. Boneberg), Beaumont (A. Hediger)^ 
Amatikulu (Natal Mus.), Dumisa (P. Suter) ; the Durban Museum has it 
from the Bluff, Durban, Mount Moreland, and Tugela (Zululand). 
This form varies considerably in size, an adult male from Dumisa having a 
total length of only 51 mm. and a female from Krantzkloof reaching 79 mm. 
In addition the following varieties may be recognised : 
(a) 0. validus var. nov. alhaniciis. — By this name I designate the form 
commonly found in the Albany and Bathurst Districts. There is generally 
a spine at both terminal angles of the fourth tarsus inferiorly, and in addi- 
tion 3.2 spines along the margin ; in several G-rahamstown examples, how- 
ever, the terminal spine on the side which includes the row of 2 spines is. 
replaced by a bristle, but the other terminal spine seems to be constant. 
The sides'^of^the fifth caudal segment are granulated, coarsely so in the males. 
G-enerally, the granulation of the vesicle inferiorly is obsolete or weak, 
but in an adult male from G-rahamstown, the granules of the paired row^ 
though few, are moderately strong ; there is no indication of a second pair of 
granular rows. The upper surface of the hand is sculptured, but not cjuite 
so coarsely so as in the Natal form. In the female there is no well-devel- 
oped smooth ridge forming the inner margin of the upper surface of the 
hand, arising from the base of the movable finger ; in the male there are 
sometimes indications of this ridge, but in such case it is broken and short. 
The legs and vesicle are yellowish, except in Pirie specimens, where the 
legs are brown. The following are measurements of an adult female from 
