60 T. V. IIODCSOX. 



second the luugcst, this and the next arc considerably oxpautled internally and 

 provided with long sctie distfllly, tlie dorsiil aspect carries a few short ones ; the two 

 terminal joints are cylindrit-al, rather slcnilrr and setose in the same manner as the 

 second and third. 



Pereiopoda. The first pair show a considerable sexual ditl'erence. In the male 

 the limb is conspicuously clavate ; the basis is long and slender, the ischium about 

 half as long. The merns is .shorter still, considerably expanded distally so as to 

 become vase-.shaped, with numerous fine setfe d(jrsally. The carpus is large and very 

 stout, expanding distidly and prolonged in its inner margin to an extent nearly 

 equalling the length of the propodus ; it is setose along its ventral margin, and distally 

 where there are also two or three spines. The propodus is also a broad joint very 

 much shorter than the carpus, it is expanded distall}- to form a sort of blunt .spur 

 ventrally, and this margin is covered with long slender set». The dactylus is 

 articulated at the outer extremity of the propodus, is very stout and overlaps the 

 carpal process liy at least half its length, it terminates in a strong claw and a well- 

 developed auxiliary ; the ventral margin is fringed with long slender setae. This 

 limb is quite different in the female, the mcrus is but little expanded and does not 

 differ otherwise from any ordinary joint ; the carpus is a little longer, expanding 

 distally with its ventral margin, forming a Hattoncd Itlade which projects beyond the 

 termination of the "shaft"; this blade is armed throughout with strong .spines, 

 longest and strongest distally ; the propodus is stout, nearly as long as the two 

 preceding joints together, with its inner margin rather swollen, and provided with 

 three spines and several series of very tine stiff setaj, forming comb-like structures. 

 The dactylus is long and slender, but does not reach the carpal process, it terminates 

 in a long claw, with an auxiliary about one-third the size, the ventral margin of the 

 joint is fringed with very small stiff setae. 



The remainder of these appendages diti'er but little in structure though a good 

 deal in size ; they are alike in both sexes and all arc very slender. In the second 

 appendage, the ischium is very little shorter than the basis, and carries a stiff seta ; 

 the merus is elongate, dilated dorsally, and also carries a stiff seta ; the carpus is long, 

 cylindrical, and provided with several sctaj ; th6 propodus is very much longer, armed 

 along its ventral margin with spines ; the dactylus is the shortest joint of the apjjendage 

 armed with two claws and a seta between them. The three following pairs increase 

 a little in length, but the posterior pair do so considerably. The basis is armed 

 distally with a .stout .spur, the ischium is considerably longer ; bent at a right angle, 

 near its middle, the bend is distinctly .shown in the structure of the'joint, but it 

 does not appear to be an articulation. All the other joints, except the dactylus, are 

 lengthened, but their spinous armature is not strengthened. 



The pleopoda, female. The lirstpair form a single openiilar plate, which is broadly 

 ovate an<l attached by a broad base ; it is spar.sely surrounded witii short .settu, and the 

 extremity is slightly irregidar. The third pair is of more complex structure, the 



