62 STALK-EYED CRUSTACEA. 
breadth of the distal end; its whole surface is granular, the granules assum- 
ing the form of small spinulous tubercles on the dorsal face, which is limited 
within by a row of larger teeth. The chela is irregularly oval, the external 
side is flattened to form an opercular facet whose proximal limit falls short 
of the articulation with the carpus; the opercular face is surrounded by a 
margin of denticles, and its whole surface is thickly set with granules or 
minute tubercles; the inner or lower side is very convex, granulated, and 
deeply excavated at the proximal end to receive the carpus when the chela 
is flexed; the outer margin of the dactylus is somewhat concave toward the 
distal end; the inner or prehensile edges of both fingers are denticulated, 
and there is a single tooth of larger size near the middle of the immovable 
finger which is received in a shallow concavity opposite to it on the inner 
margin of the dactylus. 
The left cheliped is very small in comparison with its fellow, its distal 
end hardly reaching beyond the middle of the carpus of the latter; its seg- 
ments are much more hairy than those of the right cheliped; the surface of 
the merus is pretty smooth barring a few spinules on the inferior margin ; 
the carpus is equal in length to the merus, and is armed with a series of 
teeth on the upper margin; these teeth increase in length toward the 
distal end of the segment; the basal part of the propodite is short and 
swollen, the fingers very long, gaping at the base; the outer or upper 
faces of the propodite and dactylus are granulated and definitely bounded by 
a line of regularly arranged granules on the outer margin of the dactylus 
and the inferior margin of the propodite; the inner or lower face of the 
chela is pretty free from granules, but is furnished with numerous sete, 
those on the dactylus being grouped in conspicuous tufts or pencils. 
The two pairs of ambulatory legs are of about equal length, but those of 
the right side are much longer than those on the left. The former reach as 
far as the middle of the large claw, while the latter only reach to its proxi- 
mal end. Both pairs of ambulatory legs are laterally compressed. Those 
of the first pair are armed with a row of spiny teeth on the upper margin 
of the carpus and propodite, and a series of smaller denticles is observable on 
the distal half of the lower edge of the merus. In those of the second pair 
the same armature is found on the carpus, but it is hardly visible on the 
propodite and merus. The dactyli are somewhat longer than the propo- 
dites; they are tipped with acute, horny claws and furnished with short, 
stiff setee along their margins. 
