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face of the carapace is smooth. The limiting rows of pits 
between the branchial and cardiac regions are very faintly 
indicated. 
The basal antennal joint is large, broadly sulcate in an 
oblique manner. The external distal spine is large, but not 
compressed, and is distant from the rostral horn. There is a 
small tooth at the inner distal angle. The external margin 
of the joint is slightly sinuate, and bears two spiniform 
teeth, one of which is on the distal spine. The remaining 
joints of the peduncle are not hidden by the rostral horn. 
The eyes are well developed. There is a small tubercle 
tipped with hairs above the ophthalmus. 
The epistome is somewhat excavate. 
The external angles of the buccal frame are prominent, 
the margin bearing some small, ill-formed tubercles. 
The pleon in the female has the fourth, fifth, and sixth 
segments very broad and coalesced, medianly sulcate, the 
groove marked with a few irregular punctations. The first 
three segments are very prominent medianly, especially the 
first. The external margin of the coalesced segments is raised. 
The terminal segment is broad and distally rounded. 
The sub-hepatic spine is strong, acute, and points for- 
ward. The pterygostomial one is small. 
The chelipeds in the female are slender, the merus joint 
short, not reaching as far forward as the post-ocular spine. 
It is sub-cylindrical, and bears externally three well-develop- 
ed, forward-directed spines, the last larger and at the distal 
end. The carpus bears a small tooth near the proximal end 
on the outer side. The palm is laterally compressed. The 
fingers are slender, long, about two-thirds the length of the 
palm, with minute teeth towards their ends. 
The ambulatory legs are long and rather slender. The 
merus joint of the first pair is cylindrical, and reaches nearly 
as far as the carpus of the cheliped. The carpus is sub-equal 
in length to the propodus. The proximal half of the pro- 
podus is cylindrical, the distal half not much expanded. The 
dactylus is slender. 
This specimen differs from the typical TI . tumidus in the 
following respects : — The tubercles and spines of the cara- 
pace are much more accentuated. The inter-orbital region 
has two tubercles on each side, with a broad, shallow con- 
cavity between them. The rostral horns are longer, much 
slenderer, and little compressed in the vertical direction. 
The upper orbital border has anteriorly a distinct tubercle 
and an acute spine posteriorly, the intermediate one being very 
close to this. There is a strong median tooth on the pos- 
terior margin. The second and third joints of the antennal 
