176 ZOOLOGISCHE MEDEDEELINGEN — DEEL III. 


hepatic regions, where such tubercles are placed in groups on symmetrical 
verrucosities, but otherwise, except for the usual oblique lines on the bran- 
chial regions, the carapace shows only numerous small pits, tending to 
form transverse lines on the mesogastrie and cardiac regions and oblique 
ones on the branchial areas. 
In the © the breadth of the front is exactly three-fifths of the dis- 
tance between the external orbital angles, but seems to be somewhat less 
wide in the 9 (about 57°/, of the said distance); the front itself is low, 
vertically deflexed, but whereas in the © the free margin of the front 
is visible, if the carapace is looked at from above, it is nearly wholly 
concealed behind the postfrontal lobes in the case of the Q. This an- 
terior margin has a very broad but shallow median emargination, the 
lateral parts have a somewhat oblique, not exactly transverse course and 
are continued into the rounded corners of the front; the lateral margins 
of the latter are not exactly parallel, but, as de Man remarked, they are 
somewhat converging downwards. 
The lateral margins of the carapace are somewhat diverging distally, 
so that the greatest breadth is lying above the base of the second pair 
of ambulatory legs. The outer orbital angles are sharp, directed forward, 
with convex lateral margins, that are nearly parallel to each other; the 
epibranchial teeth reach very slightly farther outward than the external 
orbital angles; they are separated from the latter by a distinct incision, 
and the anterior and lateral margins form a right angle with each other, 
the tip of which is rounded; the lateral margin of this tooth is as long 
as that of the external orbital angle, perfectly straight and somewhat 
diverging with that of the other side. In the © there is still a trace of 
a second epibranchial tooth, but I have seen nothing of this kind in the 
Q. The posterior margin of the carapace is in the 9 exactly as broad as 
the front, in the © it is somewhat narrower. As to the oblique lines on 
the branchial regions there seems to be no difference between the sexes. 
The chelipeds of the Q, except that they are of much inferior size 
than those of the ©, and all characters are, as usual, much less pro- 
nounced, show essentially the same features: there is a rectangular sub- 
distal tooth at the upper margin of the arm, the inner border of the arm 
is somewhat expanded in its distal part and feebly dentate. The wrist 
has rather few rounded tubercles, no granulated transverse lines as in the 
o, and the inner angle is produced at both sides into an acute 
depressed tooth. The outer surface of the palm has a small number of 
somewhat pointed tubercles, most distinct near the upper and the inferior 
border; near the upper border they are arranged,in three longitudinal 
lines, those near the inferior border are continued up to the tip of the 
