Annals of the Transvaal Museum 
73 
Carapace. Length of ocular area subequal to, or very slightly greater than, 
one-third of the distance from the anterior margin of the carapace to the 
fovea. Frontal eyes about one-fifth of a diameter apart, very slightly larger 
than the anterior medians: posterior row in a procurved line, the medians 
being about if diameters apart and about a diameter distant from the laterals. 
Total length 13-25, length of carapace 4-75, of tibia of first leg 4-1, of meta- 
tarsus of first leg 4-5. 
There is another adult male example agreeing closely with the above from 
the junction of the Limpopo and Olifants Rivers, P.E.A., also collected by 
Mr G. van Dam (6. vii. 1915)- In this example the third pair of sternal sigilla 
is only very faintly indicated : the eyes are a trifle larger than in the types, the 
anteromedians being subequal to the frontals : the fourth patella carries only 
about twelve spinules on its anterior side. 
The species is no doubt related to A. pectinipalpis Pure, described from 
Zululand ; the characters of the posterior row of eyes should serve to distinguish 
the two forms. 
Female. 
The collection includes no females from Magude, but a series of small 
specimens from the junction of the Limpopo and Olifants Rivers and a single 
one of somewhat larger size from Papai are no doubt referable to mossambicus. 
The principal characters of the series are : sternum trisigillate : a strip of coarse 
setae on the post- ventral border of coxa III: ocular area slightly exceeding in 
length one-third of the distance from the anterior margin of the carapace to 
the fovea : frontal eyes about one-quarter of a diameter apart, or very slightly 
more : posteromedian eyes rather more or rather less than two diameters apart 
and about 1^ diameters, or less, distant from the posterolaterals : patella IV 
only spined in its basal half or three-fifths anteriorly. The ocular characters 
vary according to the size of the individual, the frontals being always com- 
paratively close together, and the posterior medians being always nearer to 
the laterals than to each other. 
. Total length of Papai specimen 18-5 mm., length of carapace 5-8, breadth 
of same 4-7: the largest specimen of the other series has a carapace 4-75 long. 
Acanthodon hepburni sp. nov. 
Type. A single adult male example from Majuba Nek, Herschel dist., C.P., 
collected by Mr Ivan Hepburn, B.A. 
It is closely related to A . spiricola Purcell, found at Kentani, but can be 
distinguished at once by the characters of the ocular area. 
Carapace. Anterior margin truncated. Radiating grooves obsolete, repre- 
sented by short shallow depressions. Ocular area about as long as one-third of 
the distance from the anterior margin of the carapace to the centre of the fovea. 
Frontal eyes almost one-third of a diameter apart, and fairly large, being 
decidedly larger than the anteromedians, the frontal quadrangle being quite 
as broad in front as behind : dorsal cleft between the two frontal eyes fairly 
deep. Posterior median and posterior lateral eyes closely approximated, the 
distance between the medians being more than twice the distance between 
median and lateral : the posterior lateral moderately long, but smaller in area 
than the anterior median. 
Legs. Tibia I slightly longer than metatarsus I and not incrassated, its 
distal tubercle bearing a short pointed process. Metatarsus I is decidedly 
