Annals of the Transvaal Museum 
7 1 
bordered by a continuous strip of spinules : altogether there are about thirty- 
two spinules. Tarsus with one strong spine and two weaker ones at the apex 
superiorly. 
Chelicera. There is a single series of teeth, at the base of which on the inner 
side is a single moderate sized tooth : the single series comprises seven or eight 
teeth of which only the distal five are of moderate size, those at the base of the 
series being quite small. 
Legs. Tibia I slightly shorter than metatarsus I, swollen but not greatly 
so: the two tubercles near the apex are large, but the distal one has only 
quite a short black pointed process at its apex: inferiorly, towards the posterior 
side, there is a strip of about seventeen spines, including those on the mesial 
part of the lower surface. Viewed from the side, metatarsus I is distinctly 
bowed : from above, it presents a distinct angular bend on the inner side at a 
point situated about one-third of its length from the base, and at a point two- 
thirds of the distance along the segment there is another bend but only very 
slight and hardly noticeable except as the point of origin of a spine, the only 
spine on the inner side except that at the apex : inferiorly there is a row of three 
Text fig. 3. Acanthodon nigropilosus sp. nov. Tibia and metatarsus of first leg (left 
side), (a) from the mesial side, ( b ) in dorsal view. 
spines towards the outer side and two at the apex. Tarsus I with three spines 
on the anterior side and five on the posterior side, inferiorly with rows of setae 
but not scopulate. Tarsus II-IV all scopulate to the base. Band of spinules 
on anterior side of patella IV only present in the basal half of the segment and 
comprising about six or seven spinules. Patella III with about 6-9 spinules on 
the anterior side, but none on the dorsal surface except one or two on the 
distal edge. 
Carapace. The length of the ocular area is barely one-third of the distance 
from the anterior margin of the carapace to the fovea. Frontal eyes about 
one-fifth of a diameter apart; anterior medians subequal to the frontals: 
posterior row in a procurved line, the medians being rather more than i| 
diameters apart and a little more than a diameter distant from the laterals. 
Measurements. Total length 9-5 mm., length of carapace 3-65, of tibia of 
first leg 275, of metatarsus of first leg 3-1. 
The chief characters of the adult female are as follows : 
Legs. Coxa III with slender setae along the post- ventral border. Tibia II 
with 10-12 spines on its anterior side. Patella IV with the band of spines on 
