26 BRITISH GOPEPODA. 
bears two apical and two marginal sete; the last joint 
of the main limb is armed with several spine-like setze 
at the apex and on the outer margin, and the basal 
joint has one strong plumose seta. Mandible (fig. 5) 
broad and strongly toothed at the extremity; basal 
joint of the palp large. The maxilla (fig. 6) consists 
of a small masticatory segment, and a 4-digitate palp, 
the extremities of all the digits bearing three or four 
long sete. The anterior foot-jaw (fig. 7) has three 
marginal digits; the posterior (fig. 8) is 3-jointed, 
first and second joints subequal, third small, slender, 
and having three apical sete, one of which is longer 
than the others and forms a slender claw; the basal 
joint has four marginal setz, two attached at the apex 
being very long; the second joint has a series of about 
eight setz on its inner margin. The inner branch of 
the first pair of feet (fig. 9) 1s rather longer than the 
outer branch,-the terminal joints in both cases being 
rather long and slender; the outer margins are fringed 
with spine-like sets, those at the apex of each joint on 
the outer branch being unusually large. The basal 
portion of the limb is armed with three strong spines 
(fig. 9, a, a, a), the innermost of which is broad and 
lancet-shaped ; the second, third, and fourth pairs of 
feet are somewhat similar, but their setose armature is 
not quite so strong; in the male the third joint of the 
inner branch in the second pair (fig. 11) is converted 
into two spine-like processes and two slender sete, 
while the, setze usually present on the inner margins of 
the first and second joints are quite rudimentary. The 
fifth foot (figs. 12, 13) is composed of two joints fringed 
