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Bristles nos. 1, 2 and 4 are rather strongly pectinated distally; on the two latter ones the points
seem, however, to be always smooth. Bristles nos. 3 and 5 are finely serrated distally. Bristles
nos. 6 and 7 are bent somewhat into an angle distally of the middle and very strongly pectinated
distally, especially the latter one. The distal chitinons tooth of the protopodite is of moderate
length, and irregulär in form, varying to some extent. Epipodial plate: This has
from about fifty-five to sixty bristles, all with long hairs almost right out to the points. The
exopodite is five-jointed (fig. 22): First joint: The main tooth has seven constituent teeth
all well defined proximally; the secondary teeth on the latter are of about the same type as is
reproduced in the adjoining figure, but there is, however, some variation. The bristle near the
main tooth on the posterior side of the joint is about as long as the anterior constituent tooth
of the main tooth and is furnished at the middle with a wreath of long, sti ff secondary bristles
and a few secondary spines; distally it is bare. On the anterior side of this joint there are
usually four bristles; sometimes, however, five or six were found. Of these four bristles three
are situated in a close row near the main tooth, the fourth at a short distance from these three,
farther out on the joint. The two nearest the main tooth are of about the same type as each
other, subequal, rather long and powerful, strongly pectinated distally and furnished at the
middle with a number of long, stiff secondary bristles. The two others, of the same type as
each other, are subequal, somewhat shorter than the two former ones, and have at the middle
long and rather soft secondary bristles, and short, fine hairs distally. In those cases where
a greater number of bristles were found on this joint, the extra bristles were of the same type
as the two last-mentioned bristles and were situated between these. Second exopodite joint:
This has four or five, usually four, rather powerful a-bristles, equipped rathèr strongly, eight
b-bristles and one c- and one d-bristle. The c-bristle is of moderate length, either with short
hairs or with short hairs distally and furnished at the middle with some long hairs.
The d-bristle is of about the same type and length as the outer anterior bristle on the first
exopodite joint. The inner and outer lobes of the third joint are rather small. The inner lobe is
furnished distally with two or three rather strong and moderately long bristles, with short hairs
and somewhat different in length from each other. Posteriorly-proximally there is on this
lobe a moderately long bristle, with long, soft hairs at the middle and short ones distally. The
outer lobe of this joint has two moderately long bristles distally; these are either both of the
same type, with long hairs at the middle and short ones distally or else one of them is of this
type and the other lias only short hairs. On one specimen three distal bristles were found
on this lobe on the limb of one side. The fourth exopodite joint, which is rather large and square,
bas distally and inwards four or five rather short and weak bristles of somewhat different lengths
and with short, fine hairs, and somewhat proximally of these there is a group of two or three
similar bristles ; the hairs on the latter bristles are, however, somewhat stronger
than those of the former. The end joint is quite small, fixed distally and outwards on the
preceding joint, and is moved by special muscles. It has two or three, usually two, distal
bristles of moderate lengths with short hairs. Pilosity: The outer lobe of the third exopodite
joint and the two distal exopodite joints are partly furnished with fine hairs, placed close together.
The end joint lias short, stiff hairs distally.
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