Indian Deep-sea Dredging. 271 
those of the Crangonide, which they closely resemble, and 
from which they chiefly differ in their scissors-like extremity. 
They present but six distinct true joints, one of the blades of 
the terminal scissors having to be interpreted as a movably 
articulated prolongation of the propodite, and the third and 
fourth joints being all but indistinguishably fused together. 
The first two joints are short. The third joint, which is 
strongly curved like the corresponding joint of the external 
maxillipede, increases slightly in-thickness from the base to 
the apex, where its upper margin is prolonged into a sharp 
needle-like spine preceded by a few spinules. ‘The fourth 
joint, short and obconic, also bears a similar spine in corre- 
sponding position. ‘The fifth joint, or propodite, is oblong 
and somewhat compressed, it bears at the distal end two 
equal and movably articulated toothed knife-like blades— 
one answering to the fixed prolongation of the propodite, the . 
other to the dactylopodite of the typical crustacean chela,— 
which are evidently capable of playing upon one another like 
the blades of a pair of scissors or shears. 
The legs of the second pair are also only six jointed, the 
third and fourth joints being all but indistinguishably fused 
together. They differ remarkably in form from the preceding. 
The first two joints are as in the legs of the first pair, The 
third joint is a cylindrical rod armed with a few minute 
spinules on the upper margin, which terminates in a sharp 
spine. The fourth joint is also cylindrical, but shorter and 
much thinner than the preceding, and unarmed. ‘The fifth 
joint, likewise cylindrical, is about half as long as the pre- 
ceding and tapers slightly to its apex, where it bears a com- 
pactly coned pencil of possibly expansile sete. The sixth 
joint is a minute, transversely elongated, nodular rudiment, 
lodged in a notch of the upper and outer margin of the distal 
end of the propodite. 
The three remaining pairs of legs are quite different from 
their predecessors, and are substantially alike, differing from 
one another only in length and in the degree to which the 
fusion of their third and fourth joints has been carried. They 
are typical ambulatory limbs. The second only slightly 
exceeds the first, while the last, owing mainly to the great 
elongation of its propodite, greatly exceeds the second in 
length. ‘They are roughly cylindrical and are armed below 
and on the contiguous parts of their sides throughout with 
sharp spinules, which in the fourth joint or meropodite assume 
an arrangement in two rows on the ventral edges of the 
joint, while the apices of the meropodite and of the obconic 
carpopodite each bear one median dorsal and at least one 
