45 
In Ortmann’s specimen the carapace measured 24 mm. in 
breadth by 18mm. in length, the front being 15mm. In a 
dry specimen from the Durban Museum the measurements are 
20 by 15 mm., the front 12°55 mm. A specimen (preserved in 
formalin) from Kaerbooms River, measures 22 by 17°5 mm., 
the width of the front being 13 mm. Another spceimen from 
the same locality, and, like all the preceding, of the male sex, 
is 20°5 mm. broad by 17 mm. long, with a front of 13 mm. A 
female from the same river is I5 mm. in breadth, 12°5 mm. long, 
with a front of 95 mm. In every case, therefore, the front was 
considerably more than half the width of the carapace, but the 
proportion between the several measurements proved to be 
variable. The four post-frontal lobes are prominent, and there 
-is a rather deep depression behind each orbit. The sides are 
marked by five oblique striations. In the almost circular pleon 
of the female, the small terminal segment is deeply immersed 
in the broad and deep preceding segment. 
The chelipeds of the male agree with Ortmann’s description : 
‘““Upper margin of the palm with two oblique, horn-coloured 
crenate ridges, which with the tuberculated upper margin itself 
and another granular (but not horn-coloured) ridge, running 
somewhat remote from the upper margin on the outer side, 
enclose a rhombic area ; outer surface of the palm tuberculate 
only towards the upperpart, otherwise smooth ; inner surface 
with some irregular granules, but without vertical ridge ; both 
fingers at the base, near to and on the cutting edge, on both 
sides of it, beset with thick short hairs ; upper rim of the mov- 
able finger with four to five longish, longitudinal oval tubercles, 
each ribbed by many fine transverse bars, so that this finger’s 
upper margin has a milled longitudinal ridge, divided by three to 
four depressions into four to five oval pieces.”” To this it may be 
added that the thick felt of hair occupies a wide space between 
the bases of the fingers, and that between this hairy mass and 
the spoon-shaped tips there is a short denticulate margin, in 
which small denticles are enclosed between others that are 
more prominent, and of these the proximal are larger than the 
distal. In the female the fingers close together with scarcely 
a trace of hair, but with denticles continued up to the bases. 
_ Ortmann speaks of the merus or fourth joint in the ambu- 
latory legs as 24-3 times as long as broad. In the South African 
specimens the lower proportion prevails. Also in both sexes 
the second and third pairs of legs have on the back of the pen- 
ultimate and distal part of the ribbed antepenultimate joints a 
close felting of short hairs, which is not mentioned by Ortmann. 
In the corresponding joints of the fourth and fifth legs there 
