A Survey of the Scoiyion Fauna of South Africa. 
153 
Sub-family ISCHNURINAB. 
Gen. CHELOCTONUS Pocock. 
C. crassimanus Pocock (PI. XXVII, fig. 71), Ann. Mag. Nat. Hist., 6, 17, p. 
313, 1896. 
Distribution : The type was said to have come from East London. The 
.species is known to me from King William's Town (F. A. O. Pym), Kei 
Bridge (H. Kumm), Mqanduli (Miss A. Pegler), Butterworth (W. H. 
Tooke), and Weltondale (Miss Eoss). Pocock's early records of this species 
include Basutoland and ISTatal, but probably the former record should now 
be referred to anthr acinus. 
In this species the vesicle varies considerably in size, being usually much 
swollen but at other times comparatively small. Sexual differences are not 
strongly marked. The hand of the male may be just as smooth as in the 
female or it may be more or less sculptured ; the vesicle is the same in the 
two sexes ; the pectinal teeth are on the average more numerous in the male, 
ranging from 5 to 7, whereas in the female there are 4 or 5. 
A fairly distinct form of crassimamis is known to me from Weenen, Natal 
(H. L. Bulcock). It is a little larger than the typical form, the upper 
surface of the hand is a trifle flatter, the hand is not quite so strongly lobed 
on the inner side at its base, and the sides of the fifth caudal segment are 
quite free of granules. The measurements are as follows : Total length 61, 
length of hand-back 7, of movable finger 7*75, greatest breadth of inner 
portion of upper surface of hand 6, length of humerus 5*5, of brachium 6'8. 
These hand measurements may be compared with those taken from an 
adult specimen of crassimanus typicus from Kei Bridge : Greatest breadth 
of inner portion of upper surface of hand 6, length of humerus 5"2, of 
brachium 6*1, of hand-back 6, of movable finger 7'25, 
The vesicle is comparatively small in the three available specimens. This 
form I designate as C. crassimanus Poc. var. nov. dej^ressus. 
C. ANTHEAciNus Pocock (PI. XXVII, fig. 67), Ann. Mag. Nat. Hist., 7, 3, 
p. 413, 1899. 
Distribution : Described from " Gric[ualand West," and known to me 
from Ntolas and Mvenyane near Cedarville (J. E. Pope), Eiverside, Griqua- 
land East (Eev. P. Boneberg), Entree Siding near Standerton, and Polela, 
Natal (Durban Museum), Giants Castle GameEeserve (Transvaal Museum). 
The British Museum has specimens from Estcourt and Grey town in 
Natal and from Griqualand East. We have a specimen from Kokstad (Sr. 
Stephany) in which the hands are unusually smooth. 
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