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lias six bristles; of these the one situated farthest back, which is very like and obviously
corresponds to the long distal (sensory?) bristle on the end joint of the endopodite in other forms,
is moderately long, being about as long as the total length of the three distal joints of the
exopo-dite; it is somewhat shorter than the nearest of the remaining bristles, which, like the others,
is of the ordinary type with short, fine hairs. These remaining five bristles decrease almost
uniformly in length the more anteriorly (and proximally) they are situated and correspond
presumably to the five bristles on the first endopodite joint in closely related genera and
sub-genera.
M an d i b 1 e (tig. S): — Protop odite: The endite on the coxale (fig. 9) has
com-paratively few spines, mostly relatively short; its two distal points are rathei considerably more
powerfully developed than the spines, and, unlike the latter, they are furnished with weak
secondary spines; between these two points there is a rather low point; ci. remark on p. 182
above. Basale: This has seven bristles ventrally: two a-bristles, one b-bristle, two c-bristles
and two d-bristles. Of these the two a-bristles, the b-bristle and one of the c-bristles are very
short, and also one of the d-bristles is rather short; the other c-bristle, on the other hånd, is
relatively long, longer tlian the height of this joint; the longest d-bristle is not as long as the
posterior side of the second endopodite joint. Of the three dorsal bristles of this joint the
proximal one is fixed at rather a long distance in front of the middle of the joint and is about half
the length of the joint; of the two distal bristles one is about as long as the former bristle, the
other is somewhat longer; all three have short hairs. The exopodite is about as long as
or slightly longer than the dorsal side of the first endopodite joint. Of its two bristles, both of
which have short hairs, one is somewhat shorter and the other somewhat longer than this branch.
Endopodite: The four ventral bristles of the first joint all have short hairs; the two longest
of them, which are somewhat different in length, are relatively short, considerably shorter than
the posterior side of the second endopodite joint. The second joint has comparatively few
bristles along the proximal half of the anterior side: seven more or less long bristles with short
liairs, — their relative lengths vary to some extent, — and four or five short cleaning bristles
with rather strong double pectination distally. On the posterior side, distally of the middle,
this joint has two short, bare or almost bare bristles, one situated somewhat distally of the other;
one specimen, cf. fig. 8, had only one of these bristles developed on the right mandible. Distally of
these bristles there are two more bristles, situated at the side of each other, generally rather
considerably shorter and weaker than the former ones; the medial one of these is somewhat, tkougk
only slightly, longer and more powerful than the lateral one. Of the seven bristles on the end
joint (fig. 10) the two middle ones, the main claws, are about a third of the length of the second
endopodite joint. Of the two anterior ones the medial one is powerful, claw-shaped and rather
slightly shorter than the main claws; it is also distinguished by the faet that its anterior edge
has a sort of hyaline border or casing; the other of the anterior ones is weak and is only a little
more than half the length of the former one. Of the three posterior bristles one is about as long
as the main claws, but somewhat weaker, one is weak and about as long and as strong as the
shorter of the two anterior ones, the third is exceedingly short. All the bristles of the end joint,
except the anterior claw, have weak posterior secondary teeth. Pilosity: On the inside of the
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