68 
Annals of the Transvaal Museum 
Sternum with three pairs of sigilla, the first pair being marginal. 
Carapace. Length of ocular area a trifle greater than one-third of the 
distance from the anterior margin of the carapace to the fovea. Frontals 
about one-fifth of a diameter apart, subequal to the anterior medians. Pos- 
terior row in a procurved line, the medians being about 2J diameters apart 
but hardly 1^ diameters distant from the laterals. 
Measurements. Total length 13, length of carapace 5, breadth of carapace 
4-7, length of tibia of first leg 4-7. 
Female. 
The principal characters of the female are: sternum trisigillate, the first 
pair being a little removed from the margin: coxa III with stifiish setae along 
the postventral border: tibia II with nine or ten spines on its anterior side: 
patella IV with the band of spines on its anterior side stretching, with inter- 
ruptions, almost to the end of the segment : tibia IV without distinct spines on 
the anterior surface except one or two at the apex inferiorly: chelicerae with 
one large tooth representing the inner row: ocular area only very slightly 
longer than one-third of the distance from anterior margin of the carapace to 
the fovea, frontal e}res about half a diameter apart but on a single tubercle, the 
eyes of the posterior row being related to each other much as in the female but 
the hind margins are more or less in one straight line. Total length 24, length 
of carapace 9, breadth of carapace 7-7. The colour of the female is dark chest- 
nut brown on the carapace and appendages, the abdomen also infuscated : the 
male has a yellowish brown carapace and appendages. 
Acanthodon gracilipes sp. nov. 
Type. A single adult male from East London, collected by Dr Geo. Rattray 
in August 1916. The species is evidently closely related to A. thorelli O. P. 
Cambr., which is indefinitely located “ S. Africa,” but seems to differ therefrom 
in the character of the frontal eyes. It may also prove to be related to A. 
kentanicus Purcell, a species which is only known through the female type 
specimen. 
Carapace. Anteriorly it is truncated, thus differentiating the anterior and 
lateral margins. In front of the fovea the carapace is rather strongly raised, 
and there is no distinct groove between the cephalic and thoracic regions; and 
indeed all the normal radiating grooves of the carapace are obsolete. The 
whole carapace is laterally compressed except in the posterior fifth. Ocular 
area almost but not quite as long as two-fifths of the distance from the centre 
of the fovea to the anterior margin of the carapace: frontal eyes about one- 
sixth of a diameter apart, considerably larger than the anterior medians: 
frontal quadrangle about as wide in front as behind: posterior row of eyes 
subequally spaced, or the distance between lateral and median slightly less 
than the distance between the medians: posterior margin of posterior row 
situated in a straight or slightly recurved line: posterior lateral eyes long and 
large, being decidedly larger than the anterior medians. 
Legs. Tibia I slightly longer than metatarsus I, and not incrassated, its 
distal tubercle bearing a short pointed process. Metatarsus I not incrassated 
nor bent at any point, and viewed from the side it appears only very slightly 
bowed : on its outer side is a row of five spines, but on the inner side there are 
no spines nor stout bristles except the two spines at the apex. Tarsus I 
scopulate but not very strongly, without spines on either side. Patella III 
