40 



inner margin greatly bulging both beyond the fifth joint and 

 the narrowly oval finger ; all these joints are fringed with long 

 setae. 



Of the chelipeds or first peraeopods in the largest specimen 

 the larger is on the right side, but on the left in the two 

 smaller specimens. In the larger limb the third joint is 

 narrow, having a serrate inner margin, the fourth is slightly 

 shorter, proximally considerably broader, with its sinuous 

 inner margin strongly serrate, devoid of the tooth present 

 in many species ; the fifth is broad but longer than broad, 

 equal to the sixth in breadth, but shorter than its 

 total length, though longer than the trunk of it without the 

 thumb ; the trunk of the sixth joint is nearly square, longer 

 than the thumb but equal in length to the finger ; thumb and 

 finger are a little separated at the base, setose on the outer 

 and inner margins, the inner being in each tuberculate, in 

 two series with a cavity between on the thumb, in one series 

 along a sharp projecting lobe on the finger. The smaller 

 limb has the third and fourth joints devoid of conspicuous 

 serration, the fourth not bulging, the fifth about twice as long 

 as broad, as long as the sixth, in which the thumb is longer 

 than the trunk and together with the still longer finger is 

 densely setose and on the inner margin tuberculate. The 

 second peraeopods have extremely long setae on one margin 

 of the fourth and fifth joints, the fifth widening distally, 

 considerably longer than the setose sixth, of which the 

 thumb is longer than the short trunk and a little shorter than 

 the finger, finger and thumb acute, densely setose, forming a 

 small but regular chela, the apices not curved for over- 

 lapping. In the third peraeopods the fourth joint has few 

 setae, the fifth is distally widened and has some apical 

 groups, while the sixth and seventh joints are covered with 

 these ornaments ; what may be called the trunk of the sixth 

 joint is a little wider than the fifth but not half as long, but 

 it is produced backward in a great rounded lobe fringed with 

 long curving setae, so that its entire length exceeds that of 

 the fifth joint ; to its truncate extremity is attached the 

 broadly triangular, densely setose, finger, which is little 

 longer than broad. In the fourth peraeopods the fifth joint 

 has a distal group of setae, but the sixth and seventh joints 

 are so buried in them that the outlines of the joints are 

 difficult to follow; especially the sixth joint has on the breast 

 at the distal half a closely set triangular group of serrate 

 spine-like setae which appear to mark a short blunt 

 prolongation of the joint ; this would give a kind of chelate 

 antagonisn to the oval finger, which is scarcely half as broad 

 and not half as long as the sixth joint. The fifth peraeopods 

 are rather sub-chelate than chelate, a very small curved finger 



