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at the middle. End o pod ite: In a few cases five ventral bristles were observed on the
first joint; from one to three of these bristles have no wreaths of secondary bristles; the bristles
on the anterior side of the second joint are like those in the female, but have no long secondary
bristles. The bristles of the end joint are somewhat shorter and weaker than those of the female;
the proportion between the length of the anterior side of the second endopodite joint and the
length of the longest claw is in the female about 28 : 28, and in the male about 28 : 24; the middle
claws are finely pectinated. The pilosity is the same as in the female.
Maxilla: — Protopodite: The first endite has nine or ten bristles. E n d
o-p odite: The first joint has four bristles postero-distally. The end joint had on one specimen
only three a-bristles on the maxilla of one side, otherwise there were four as in the female. Apart
from this it is equipped with bristles in quite the same way as the female. The proportion between
the bristles is sometimes about the same as in the female, but it is subject to variation. The
bristles of the protopodite and the exopodite, like those on the first endopodite joint, are furnished
with long, soft hairs either at the middle or along the greater part of their length. Some of the
bristles on the end joint of the endopodite may be sparsely furnished with soft hairs too.
Pilosity: The first endopodite joint has very abundant and rather long hairs on the outside;
on the protopodite and the end joint of the endopodite there are also groups of short, fine hairs
to be observed.
F i f t h 1 i m b (fig. 15) : — Protopodite: The three endites generally have the
same number of bristles as in the corresponding processes in the female, though they sometimes
have one or a few bristles less. Exopodite: The d-bristle on the second joint sometimes
seems to be missing; the inner lobe of the third joint sometimes has four bristles; apart from this
the equipment of bristles is similar to that of the female. The two bristles on the outer lobe
of the third joint are somewhat larger than in the female and have very abundant
long hairs. The outer of the six bristles on the fourth joint is often considerably longer
than the other bristles on this joint and is often bare. The relative length and the pilosity
of the bristles of this limb are subject to variation. Pilosity: Large parts of this limb
have groups of short, fine hairs.
S i x t h limb: — The epipodial a p pen dage seems in most cases to be
represented by only three short bristles.
S e v e n t h limb: — This is somewhat shorter than in the female; in specimens with
shells about 3 mm. long it was about 1,4 to 1,6 mm. long. The secondary spines on the cleaning
bristles proximally of the belis are more weakly developed than in the female or are quite absent.
The end comb has the same or a slightly smaller number of teeth, which are, however, exceedinglv
weak, often arranged somewhat irregularly; their basal spines and wing-like processes are verv
weakly or not at all developed. The cavity situated dorsally of the end comb is often more
or less compressed. The chitinous pegs on the dorsal edge of this cavity are in most cases
somewhat fewer than in the female. It is probable that the end comb in this sex is not used as
a cleaning organ in the real meaning of the term.
Penis (fig. 6): — One distal branch has near the base a somewhat bent and rather
strongly chitinized peg-like process. Distally on the two distal branches there are in most
)
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