62 STALK-EYED CRUSTACEA. 



breadth of the distal end ; its whole surface is granular, the granules assum- 

 ini"- 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 articidation 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 innnovable 

 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 definitel}- 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 setae, 

 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 laterall}' 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 setae along their margins. 



