’s RIJKS MUSEUM VAN NATUURLIJKE HISTORIE — LEIDEN. 249 


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Sides of carapace parallel, upper surface very much flattened, 
smooth and shining; postfrontal lobes much prominent, sharply spi- 
nulous at their anterior margin. Ses. polita de Man. 
Sides of carapace convexly arched or divergent posteriorly, surface 
uneven. 43 
Chelipeds and walking legs much hairy; meropodites of the latter 
very broad, their length being only 1'/, times their greatest breadth, 
which is lying at the distal end. Postfrontal lobes very slightly pro- 
nounced, each of them tufted by long hairs. Very small species, 
breadth of carapace about 7—8 mm. Ses. pontianacensis de Man. 
Chelipeds not hairy at all, at least not at the outer surface. of 
wrist, palm and fingers. Postfrontal lobes well indicated, sometimes 
rounded off at their anterior margin. 44 
Sides of carapace convexly arched in their anterior half 
only, concave in their distal half; anterior epibranchial tooth with 
a very long lateral margin; second epibranchial tooth well indicated, 
prominent. Adult © with two black, blunt spines at upper border of 
mobile finger. Ses. smithi Tl. Milne-Edwards. 
Sides of carapace convexly arched along their whole course, 
or divergent posteriorly ; second epibranchial tooth, if present at all, 
very minute. Upper margin of movable finger in adult < often with 
a longitudinal row of transverse tubercles or rounded knobs. 45 
Greatest breadth of carapace lying at the level of the posterior 
epibranchial teeth; sides of carapace rather regularly convexly arched. 46 
Greatest breadth of carapace lying ‘al the level of the penultimate 
part of legs; sides of carapace straight or even slightly concave, but 
always more or less divergent posteriorly. 47 
Carapace flattened; inner postfrontal lobes nearly 3 times as broad 
as the outer ones. Inner angle of wrist of cheliped produced; upper 
margin of palm with a coarsely serrulate longitudinal crest. Dactyli 
of walking legs thickly tomentose, as also the outer border of the 
propodites. Ses. rotundata Hess. 
Carapace more vaulted; inner postfrontal lobes nearly as broad as 
the outer ones. Walking legs with only some few isolated hairs. 
Ses. cruciata Birger. 
Upper border of mobile finger of cheliped with a rather sharp, 
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