132 Transactions of the Royal Society of South Africa. 
F. 51 ; of fifth caudal segment, M. 12, F. 11*8 ; of vesicle, M. 13, 
F. 13-25. 
The above measurements are from specimens taken in North-West 
G-ordonia. 
Dr. Purcell (15) records somewhat larger examples, with carapace in the 
female ranging from 17i to 19 mm. in length. A male example from 
Kimberley has the following dimensions: Length of carapace 13'5, of 
movable finger 14*75, of hand-back 9'7, breadth of hand 9-4, total 
length 94. 
Colour brownish, more or less tinged with olive ; interocular area 
coloured like the rest of the carapace ; legs yellow or pale ; hand and 
vesicle pale ; crests of palps, the fingers, and usually also the anterior half 
of each tergite olive. 
This species has two fairly well-marked forms, viz.: (1) A larger variety 
found in Bushmanland and Western Grordonia, remarkable in that the hands 
are very similar in shape in the two sexes, though not quite identical, and 
the upper surface of the hand is beset with low tubercles ; (2) a smaller 
variety found at Kimberley, Mount Temple (Bechuanaland), and on the 
western side of the Harts Eiver (Barkly division), which has hands nearly 
smooth in both sexes and the hand of the male much narrower than that 
of the female (cf above measurements). Dr. Purcell mentions specimens 
from G-erman South-West Africa in which the under surfaces of the abdominal 
and anterior caudal segments are strongly corrugated in the male, but 
smooth in the female ; this can be regarded as a third form, for the character 
does not occur in the Kimberley or West Grordonia forms. 
The shape of the genital operculum is a noteworthy character of this 
species. 
Distribution : This species is widely distributed in the western parts of 
South Africa, being common in Grerman South-West Africa and Grordonia, 
extending eastwards as far as Kimberley and Bloemfontein (Dr. T. F. 
Dreyer), southwards into Grreat Bushmanland (Namaqualand and Kenhardt 
Divisions of Cape Province), and northwards it is recorded by Mr, Pocock 
from Umfuli Eiver, Mashonaland (5). It seems to be one of the most 
generalised species in the genus. 
10. 0. scHLECHTERi Purcell, Ann. S. Af. Mus. vol. i, pp. 12, 143, 1898. 
Distribution : Types from Little Bushmanland, between Henkries, 
Naroep, and Sabies. The species is only known from Bushmanland. 
11. O. ATER Purcell, Ann. S. Af. Mus. vol. i, p. 16, and ii, p. 197, 1898. 
Distribution : Type from Steinkopf ; also known from the neighbourhood 
of Port Nolloth. 
