Annals of the Transvaal Museum, 
191 
not so much drawn out as in pilosum. The posterior upper edge of the 
shield is fairly well-defined, but is not so strongly acute as in pilosum. 
The distinction between upper and marginal surfaces is well maintained 
all round, but the edge in front is not well marked. The marginal surface is 
deepest anteriorly, shallowest posteriorly : posteriorly, as well as elsewhere, 
it is coarsely pitted. The shield is densely bearded throughout, more 
strongly so than in pilosum. Its upper surfaces often present a roughened 
-or corrugated appearance, the intervening spaces between the punctuations 
being rarely so flattened as in pilosum. 
In the mid-dorsal region, just in front of the shield, the soft skin of 
the abdomen presents several fairly distinct transverse rows of longish 
setae, and amongst them some still longer and stiffer setae : ventrolater- 
ally, the oblique rows of bristles give to the area a bearded appearance 
in naked eye view. This is a very constant character in the species. 
Carapace with a number of long bristly hairs on the raised head 
:region dorsolaterally and between the eyes of the posterior group. 
Measurements .- — Total length 20 -5, length of carapace 7 -8, breadth 
<of carapace 5 -8, length of upper surface of shield 10 -25, breadth of upper 
surface of shield 8, depth of marginal surface measured anteriorly about 
3 mm. 
In very juvenile specimens the shield has the appearance of a very 
thick regular disk with polished surfaces. The smoothed marginal surface 
is sharply defined all round, the flat upper surface presenting a continuous 
subcircular edge which even in front is fairly acute. 
This species differs from pilosum in the shape of the shield and in 
the stronger development of hairs thereon, and on the soft skin of the 
abdomen dorsally. The series exhibits a little variation in the form of the 
shield and in the convexity of its upper surface, one specimen from 
Zeekoegat approaching the coronatum condition : the latter species is, 
however, much less hairy. Some rather small specimens from Witfontein, 
near Pretoria North, have a subcircular upper surface and anteriorly the 
two surfaces almost merge indistinguishably. In juvenile specimens the 
posterior edge of the upper surface is quite sharp. A single specimen 
was taken at Rosslyn. 
A series of specimens collected at 'Derdepoort is clearly referable to 
Mrsutum, but presents minor differences in the form of the shield. They 
differ from the types in that the junctional line between the two surfaces 
of the shield is less closely defined : in this series, the posterior edge of 
the upper surface is often quite weak, its forward continuation being lost 
on the curved upper surface, whilst a new line of junction is formed between 
the two surfaces shaped somewhat like that of robertsi, being deepest 
anteriorly and curved forwards laterally. This line is often very weak 
or indefinite at the sides : anteriorly it may be weak, but is never so 
obsolete that the marginal and upper surfaces completely merge as often 
occurs in pilosum. 
It may be noted that the ocular characters in this species vary 
considerably. The posterior median eyes may be a trifle nearer to each 
other than to the posterior laterals or vice versa. 
