A Survey of the 8cor]_)ion Fauna of South Africa. 
157 
founded on a small male from British Bechuanaland ; the type was no 
doubt immature, and the description is certainly insufficient for critical 
determination. H. austro-africanus Penth, described at the same time and 
said to have come from Matabeleland, was founded on very young examples, 
and is quite unidentifiable. 
The Albany Museum has an adult female, taken not far from Serowe 
(S. Blackbeard), which seems to represent a distinct form ; it is a connecting 
link between the Serowe form of troglodytes and granulatus. This variety, 
which I now describe as H. troglodytes var. crassicaudatus, has the following 
characters and measurements distinguishing it from the form just described: 
Tail slightly shorter, the first caudal segment distinctly shorter and stouter 
than in the typical form ; humerus rather more elongated and narrower ; 
the teeth of the inferolateral and mesial rows on the fifth caudal segment 
much more strongly developed ; pectinal teeth 15 ; superior crests of caudal 
segments II-V only weakly denticulated. Length of carapace 17*7 ; of 
tail 72 ; of first caudal segment 9-3, breadth of same 3-4, height behind 4*2 ; 
length of second caudal segment 12, of third segment 12*5, of fourth 
segment 14, of fifth segment 13-2 ; of vesicle 10, breadth of vesicle 3, height 
of same 3*8; width of upper surface of humerus, including granules, 5-75. 
The sides and lower surfaces of vesicle are only very finely granulated ; the 
external surfaces of the patellae are granular almost throughout. 
Another form of troglodytes is known to me from a single adult male 
example in the collection of the Transvaal Museum taken at Yliesenpoort, 
Eustenburg District. This form, which I now designate H. troglodytes var. 
dentatus, has the following characters : Superior crests of caudal seg- 
ments II-Y strongly denticulated (in the Serowe form, II and III are not 
denticulated or only faintly so), and the terminal tooth in II and III is 
subspiniform ; caudal segments a little deeper posteriorly and not quite so 
much elongated as in the Serowe form ; anterior margin of carapace not 
quite straight, very shallowly excavated. 
Total length 141, length of carapace 14*5, of first caudal segment 13-5^ 
of second caudal segment 16*3, of third segment 16*25, of fourth seg- 
ment 17*9, of fifth segment 15-9, of vesicle 8*7, height of first caudal 
segment posteriorly 4, height of second segment posteriorly, including the 
terminal tooth, 4*7, length of hand-back 15*5, length of movable finger 14*75, 
breadth of hand 8-9. Pectinal teeth 22. 
The Transvaal Museum has another male example, unfortunately without 
locality data, which seems related to this form, but differs as follows : 
Caudal segments more elongated (1475, 187, 18-9, 20-4, 18-1, 975) ; the 
superior crests of II and III are not so strongly denticulated, though quite 
definitely toothed ; carapace straight in front ; pectinal teeth 21-23. 
