186 Transactions of the Royal Society of South Africa. 
Anterior margin of carapace shallowly excavated. Superior crests of 
caudal segments II and III with large subspiniform terminal teeth, and in 
the larger specimen a similar tooth, but not so strongly developed, occurs on 
segment I. The superior crests of all the caudal segments except the first 
are denticulated. Vesicle quite devoid of granules. Pectinal teeth 16-17. 
This differs from matoppoanus in the large size of the terminal teeth of 
the superior crests of caudal segments II and III, that of II in the present 
form being larger than that of III, whilst in mato^jpoamis the terminal tooth 
of II is not enlarged, being less than that of III, which is slightly enlarged. 
The female of gunningi is very like this form, and probably the two will 
eventually be found to merge. 
The female of clentatus is larger than that of gunningi. In specimens of 
equal size the superior caudal crests of dentatus are rather more strongly 
dentated or granulated than in gunningi. This is noticeable in the fifth 
caudal segment, which in the former is well denticulated, but in the latter 
is rough and granulated rather than denticulated. There is more or less 
distinct but weak crenulation on the superior crests of caudal segments I in 
dentatus, but not in gunningi. In specimens of equal size the tail is just a 
trifle longer in dentatus. 
Measurements of largest female : Total length 117 ; length of carapace 15, 
of hand-back 14-6 ; breadth of upper surface of hand 9 '2 ; breadth of last 
sternite 12*5 ; length of last sternite 9 ; length of first caudal segment 7'75, 
of second 9-6, of third 9-6, of fourth 11-2, of fifth 11'35, of vesicle 8-5; 
posterior height of first caudal segment 3'5 ; posterior 1 readth of same 3. 
This form can be regarded as a link between the Bcchuanaland form of 
troglodytes and gunningi, ^kiidi with propriety might be referred to either species. 
Hadogenes troglodytes, Peters. 
Some particularly fine specimens of this species have recently been 
received by the Transvaal Museum from the Zoutpansberg District. Females 
from Blauwkop have 20*22 pectinal teeth. Two males from N'jelele Eiver 
have 24'25 and 29*30 pectinal teeth. In females the superior crests of 
caudal segments II and III are distinctly denticulated, at any rate in the 
posterior three-fifths of their length, and in one specimen practically over 
the whole length. The terminal teeth are not subspiniform. In the larger 
male, which has most pectinal teeth, those crests are strongly denticulated, 
and the terminal teeth are enlarged and almost subspiniform. In the 
smaller male those crests are comparatively weakly denticulated. The 
vesicle is stout and deep with a short aculeus. 
This form closely resembles that found at Serowe, but the caudal 
segments of the adult male are not quite so slender and elongated as in that 
form. In the male the anterior margin of the carapace is faintly 
emarginate. 
