ISOPODA. 38 
exposed part is a narrow, rather tapering band, terminating in four stiff plumose 
bristles ; the outer lobe is much broader and terminates in four strong teeth and some 
half-dozen smaller pectinate ones. 
The second pair of maxille is elongate, the inner lobe is broad, very slightly 
tapering and curved backwards; the inner border is fringed with fine sete and 
distally with plumose bristles. Of the two outer lobes, the inner one is a little the 
broadest ; both terminate in long plumose bristles. 
The maxilliped is long, divided into two equal halves as regards length. The 
inner margin is straight throughout; the basal half tapers in a sinuous line to about 
half its diameter; the distal half is narrow, rounded externally, distally armed with 
numerous and thickened plumose bristles, one papilliform tooth, and at least two of 
these bristles occur on the inner margin. The palp is five-jointed; the first joint is 
small; the second is the longest and has distally a long stout digitiform process 
armed with sete; the third joint is short, its process a little larger than the 
preceding and occupies the whole joint. The fourth is twice as long and a 
“smaller process is directed forwards; the terminal joint is slender and_setose. 
The epignath is of moderate size, about half the length of the basal joint and ovoid 
in shape. 
The pereiopoda are all very much alike and of quite simple structure ; the first 
is the shortest and stoutest, the second is a little longer, and from this onwards they 
‘progressively increase in size to the last; the increase is, however, very small and 
chiefly concerns the first two joints. Of the first pereiopod the basis is stout, 
constricted immediately beyond its articulation with the body ; the ischium is more 
than half the length ; the merus is short and considerably expanded dorsally to form 
a sort of shallow cup for the carpus; this joint is very small, triangular in fact, its 
dorsal margin being reduced to a minimum; the propodus is a stout joint, third in 
point of size, and its proximal end is in contact with the merus dorsally. The 
dactylus is half the length, stout, and carries a curved nail distinctively marked off 
from the joint, and immediately underneath is a small but very stout accessory claw. 
A few setee occur distally on all the joints except the first two; on the carpus and 
propodus there is distally and ventrally a single stout denticulate spine, closely 
resembling those on the ovigers of many Pycnogonids. 
In the remaining appendages the basis increases a little in length, the ischium 
increases more, so that on the last appendage it is nearly as long as the basis. 
The merus is larger than on the first limb, but very little larger than the carpus ; 
both these joints are dilated distally, the former retaining its forwardly directed dorsal 
lobe; the propodus remains a simple cylindrical joint, and the dactylus stout and 
curved, discoloured, and provided with a small but very stout accessory ; sometimes 
there is a second. Sete occur distally on all the joints and occasionally elsewhere. 
There are no denticulate spines. 
The pleopoda. The first pair comprises a very short and broad protopodite. The 
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