60 
T. V. HODGSON. 
second the longest, this and the next are considerably expanded internally and 
provided with long set.se distally, the dorsal aspect carries a few short ones; the two 
terminal joints are cylindrical, rather slender and setose in the same manner as the 
second and third. 
Pereiopoda. The first pair show a considerable sexual difference. In the male 
the limb is conspicuously clavate ; the basis is long and slender, the ischium about 
half as long. The merus is shorter still, considerably expanded distally so as to 
become vase-shaped, with numerous fine setae clorsally. The carpus is large and very 
stout, expanding distally and prolonged in its inner margin to an extent nearly 
equalling the length of the propoclus ; 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 distally to form a sort of blunt spur 
ventrally, and this margin is covered with long slender setse. The dactylus is 
articulated at the outer extremity of the propodus, is very stout and overlaps the 
carpal process by at least half its length, it terminates in a strong claw and a well- 
developed auxiliary ; the ventral margin is fringed with long slender setse. This 
limb is quite different in the female, the merus 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 flattened blade 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 line stiff setae, 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 differ but little in structure though a good 
deal in size; they are alike in both sexes and all are 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 setse ; the propodus is very much longer, armed 
along its ventral margin with spines ; the dactylus is the shortest joint of the appendage 
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 first pair form a single opercular plate, which is broadly 
ovate and attached by a broad base; it is sparsely surrounded with short setse, and the 
extremity is slightly irregular. The third pair is of more complex structure, the 
