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with these bristles in the male. The sensory bristle of the fifth joint is of about the same length
and type as in the male, but has fewer (six or seven) long, proximal sensory filaments. Of the
distal bristles the b-bristle, contrary to what is the case in all other forms of this sub-family
that are described in this work, is simple, without sensory filaments, of about the same type as
the d- and e-bristles; it is about as long as the anterior side of the fourth to the sixth joints.
The c- and f-bristles are subequal and about as long as the whole antenna (about 1,1—1,2 mm.,
thus somewhat more than half the length of the shell; the former has eight, the latter nine
or ten filaments. The g-bristle is somewhat longer than the c- and f-bristles and has ten filaments.
The distal filament on the three last-mentioned bristles is very short, the others are ail of the
same type, most of them rather long, furnished with up to three weak spines. The two
simple sensory bristles d and e are somewhat longer than in the male. The pilosity is similar
to that of the male.
Second antenna: — The protopodite, like the e x o p o d i t e, is
somewhat more weakly developed than in the male; apart from this the two sexes show a very close
resemblance with regard to this limb. The proportion between the joints of the e x o p
o-d i t e, measured on the same scale as in the male, (cf. above) was as follows (the length of the
specimen measured was 1,65 mm.):
I : II : III : IV : V : VI : VII : VIII : IX 21 : 7 : 4 : 3 : 3 : 3 : 2 : 2 : 1.
From these figures it will be seen that the proportion between the joints is about the same in
both sexes, but that, as has been mentioned above, the exopodite is, on the whole, somewhat
weaker in the female.
Mandible: — This shows an agreement in details with that of the male. Ail the
specimens investigated had on the posterior side of the second endopodite joint, distally
of the middle, two short bristles, one situated somewhat distally of the other, thus agreeing
with what we must regard as normal in the males. It may be specially mentioned that the
posterio-distal bristles of the joint in cpiestion are quite similar in both sexes.
Maxilla: — This agrees with that of the male. It may, however, be noticed that
the powerful posterior bristle on the first endopodite joint, which is speciallv characterized
in the male by being bent almost at a right angle somewhat distally of the middle, is only weakly
bent in the female; it is also rel’atively somewhat shorter and has moderately strong pectination
distally.
Fifth limb: — Quite like that of the male.
Sixth limb: — Very like that of the male. It differs by the epipodial
a p p e n d a g e of the protopodite being represented by four short bristles. The second
exopodite joint has seven or eight bristles ventrally, of which the four or five anterior ones are
furnished with long, stifï secondary bristles, in most cases arranged in two very distinct wreaths.
Se ven th limb: — This is quite similar to that of the male.
F u rca: — This is of the same shape as in the type species. All the claws have
secondary teeth; the proximal teeth on claws nos. I to 8, unlike these in the male, do not differ
strikingly from the distal teeth by their size and strength.
Zoolog, bidrag, Uppaala. Suppl.-Jid. I.
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