A Survey of the Scorpion Fauna of South Africa. 131 
9. O. cARiNATus Peters (PI. XXV, fig. 57), Sitz. Ber. Berlin Akad. p. 505, 
1861. 
As a number of allied species have been described within recent years, 
although no full account of carinatus has yet appeared, the following 
description may serve a useful purpose : Median groove of carapace forked 
in front, the depressed area included within the fork angularly inclined on 
each side to the general surface of the carapace, and thus the anterior 
border of the carapace presents a downwardly directed V-shaped median 
notch ; interocular area smooth, sides of carapace granular, but not coarsely 
so, the granules on the lateral borders of the interocular area not much 
coarser than those elsewhere situated ; median eyes situated at a point 
about f of the length of the carapace distant from its hind border, some- 
times a trifle nearer the middle of the carapace ; sternites in both sexes 
entirely smooth, or the last one in the male may be faintly or strongly 
corrugated ; first caudal segment inferiorly smooth (or, in the male, 
corrugated like the last sternite), without inferomedian or inferolateral keels, 
or the latter may be present, having several coarse pits in its course, but no 
granules ; in the second segment the inferior surface is similar, but all four 
keels are present ; in the fourth segment they are all strongly granular ; 
terminal tooth of superior crest in caudal segments 2-4 enlarged and 
spiniform ; first 6 tergites entirely smooth and polished in the female except 
on the hind borders, and to a slight extent at the sides, very finely granular 
in the males, more especially at the sides ; hand of female moderately broad, 
lightly convex above in its inner portion, and covered with numerous very 
low, isolated, but closely packed tubercles of varying shape, or sometimes 
the tubercles fuse together and are so flattened that the surface is practically 
smooth throughout; the finger keel smooth and more or less continuous 
throughout its length, but broken up near the base of the hand, the 
secondary keels obsolete ; hand of male like that of female, but a little 
narrower or sometimes considerably narrower; the length of the hand-back 
sometimes considerably less than the breadth of the hand and sometimes 
a little greater ; anterodorsal keel of brachium smooth or somewhat granu- 
lated, posterodorsal keel almost obsolete ; the fourth tarsus with two spines 
on its anterior edge below, the superior lobe about as long as or a little 
shorter than the lateral lobes ; pectines with 24-32 teeth in the male, the 
scape being rectangular at the base behind, with 15-20 teeth in the female, 
the scape being rounded at the base behind ; genital operculum considerably 
broader than long in the male, a little longer than broad in the female ; 
chelicerae with stridulatory lamellae. 
Measurements. — Total length, M. 100, F. 100 ; length of carapace, 
M. 15, F. 16-8; of humerus, M. 13-15, F. 12-4; of brachium, M. 1275, 
F. 12-5; of hand-back, M. 10-5; F. 11-2; of movable finger, M. 16-75, 
F. 16-5; breadth of hand, M. 12-25, F. 13-5; length of tail, M. 53-25, 
