Crustacea Decapoda and Stomatopoda. 
239 
than the rest of the carapace. The front is abruptly and vertically deflexed and is 
not visible in dorsal view. When viewed obliquely, the edge is seen to be produced 
to two broadly rounded lobes on either side of a median excavation The four post- 
frontal lobes are sharp-edged and present a straight transverse hne ; those of the in- 
ner pair are broader than those of the outer and are separated by a deep mid-dorsal 
groove that extends to the anterior end of the gastric region. Behind the outermost 
post-frontal lobes on a level with the inner angle of the orbit there is a small but dis- 
tinct elevation. The superior margin of the orbit is oblique and sinuous ; the outer 
orbital tooth is sharp and rather broad, but does not extend so far outwards as the 
end of the cornea. There are two small epibranchial teeth, both obtuse and inconspi- 
cuous ; the breadth between the foremost pair is a trifle less than that between the 
outer orbital angles. The lateral margin of the carapace is defined on either side by 
a sharp ridge, and the postero-lateral surface, though indistinctly rugose, bears no ob- 
lique striae, except for one, of considerable length, immediately over the bases of the 
last two pairs of legs. 
The chelipedes much resemble those of S. sylvicola, de Man. The upper border 
of the merus ends in a subrectangiilar, subterminal lobe ; the inner and outer margins 
are denticulate, the former being slightly produced near the distal end. The inner 
surface bears two longitudinal rows of hairs and the outer surface is furnished with 
a number of conspicuous granules. The 
finger-cleft, where there is a perfectly smooth, conspicuous depression (text-fig. 4). 
The tubercles are most closely packed on the upper border and from those which are 
scattered irregularly over the lower surface a single series, composed of four or five, 
extends on to the base of the fixed finger. The inner surface much resembles the 
outer, being similarly tuberculate and having a similar depression near the base of the 
fingers. It shows no distinct transverse row of tubercles. The fixed finger, except 
for the few tubercles at the proximal end of its lower margin, is smooth. The dacty- 
lus is nearly twice the length of the upper border of the palm ; at its proximal end there 
are numerous small tubercles which extend in a single row a little beyond the middle 
of its length. In lateral view from six to eight tubercles are visible. There are occa- 
sional short, dark brown hairs on the carpus, palm, and at ths base of the dactylus. 
The walking legs are exceptionally slender. The merus in each pair bears a 
prominent subterminal tooth on its anterior margin ■ the segment in the penultimate 
pair is little less than four times as long as broad. The dactylus in the first three 
upper surface of the carpus is strongly 
rugose ; on its inner margin there are 
numerous denticles, but no outstanding 
tooth. The chela, in its general form, al- 
most precisely resembles that of 5. sylvicola. 
The palm is swollen and strongly tubercu- 
lar externally, the tubercles being, however, 
confined to its proximal three-quarters, 
being absent in the neighbourhood of the 
Fig. 4. — Sesarma foxi, sp. nov. 
External view of left chela of male. 
