Annals of the Transvaal Museum 
69 
with about twenty-four or twenty-five short spines on the anterior side, 
including those on the distal edge, also with a strip of about seven rather 
longer ones dorsally : IV with short spines over f—f of the length of the segment. 
Coxa III with a band of stiff setae on its post-ventral border, but the stiff 
setae are sparsely scattered in the distal half of the segment, and the band is 
only well defined in the basal half. 
Pedipalp. Tibia about twice as long as deep, the excavation with the usual 
strip of short spines, wdiich may be quite broken in the middle or more or less 
continuous. Tarsus with a group of stout spines at the apex superiorly. 
Chelicerae. The main row of teeth includes 5-7 large teeth and one or two 
minute ones at the base of the series : in addition, there is a single large tooth 
on the inner side of this series, adjacent to the one or two minute teeth. 
Colour. Carapace and appendages yellowish brown: abdomen superiorly 
somewhat infuscated. 
Measurements. Total length 13, length of carapace 4-8, breadth of carapace 
3*65, length of tibia I 5, of metatarsus I 4-4, of first leg 24-4, of second leg iq- 6, 
of third leg 17 -8, of fourth leg 25-5. 
Female. 
The principal characters of the female are as follows: coxa III with a tuft 
of stiff setae on its post-ventral border, but the tuft is only compact in the 
basal half and even there is not so dense as in the females of hirsutus: sternum 
with two pairs of sigilla, the first pair being slightly removed from the margin : 
dentition of chelicerae as in the male : length of ocular area very slightly more 
than, or subequal to, two-fifths of the distance between the anterior margin of 
the carapace and the middle of the fovea : frontal eyes about one-quarter of a 
diameter apart and situated on a common tubercle which is grooved above, 
the frontal quadrangle being considerably broader in front than behind: 
posterior median eyes only a trifle nearer to the laterals than to each other, 
the posterior margins of the posterior row in a slightly recurved line : anteriorly, 
patella IV is spined over f—f of its length : the anterior margin of the carapace 
is well marked off from the lateral margin : the pair of long setae behind the 
ocular area is situated midway between the middle of the fovea and the 
anterior margins of the anterior median eyes. Total length 15*5, length of 
carapace 5-2, breadth of carapace 4*5. 
Acanthodon hirsutus sp. nov. 
The types of this species are four adult males collected at East London by 
Mr F. Cruden during June 1915. The species is related to A. microps mihi from 
Grahamstown, to A. gracilipes sp. nov., and to the Kentani species A. ken- 
tanicus Purcell. The adult males of these species — except that of hentanicus 
which is unknown — can easily be distinguished by the characters mentioned 
in the accompanying key, but the females are less sharply differentiated, and 
the only available points of distinction seem to be those presented by the 
fringe of stout setae on the inferior surface of coxa III and the ocular charac- 
ters. 
Carapace. Anteriorly it is truncated, the anterior and lateral margins being 
well differentiated. Except on the head region, the surface is depressed. The 
groove between cephalic and thoracic regions is well defined, over a portion of 
its length at least, and other radial grooves are present on the carapace. 
Ocular area about two-fifths as long as the distance from the anterior margin 
