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hairs. Of the distal bristles the b-bristle is about as long as the anterior side of the second joint
or somewhat shorter; its proximal filament is furnished with a chitinized verruciform swelling
distally of ÛiQ C. (Vargula) norvegica-, seefig. 15of this species). Apart from this filament
there are on this bristle only two others, each furnished distally with five small, weak suctorial
organs and proximally of these a small verruciform process; the distal one of these filaments
does not reach the point of the bristle. The c-bristle has ten filaments; the proximal one of
these is about the same as the proximal one on the b-bristle, no. 3, counting from the base,
is about as long as or only slightly longer and more powerful than the following ones and has
distally three very small and weak suctorial organs, proximally of which there is, as in the
b-bristle, a small wart; the other filaments on this bristle are furnished proximally with from no
to three very fine, secondary spines; the distal filament is very short and verruciform. The
f-bristle also has ten filaments, furnished with up to three short, fine secondary spines proximally;
the distal one of these filaments is verruciform. The c- and f-bristles are subequal and rather
considerably longer than the whole length of the shell (measuring from 2 to 2,1 mm. in specimens
with a length of shell of 1,72 mm.).* The g-bristle, which has eleven filaments, whose proportions
and equipment are about the same as the filaments on the f-bristle, is not quite so long as the
whole antenna. The simple sensory bristles d and e are somewhat different in length, the longer
one, the d-bristle, being about as long as the total length of the four distal joints (the original
fifth and sixth joints being reckoned as one joint). Pilosity: On the posterior side of the second
joint there are numerous transverse rows of short, stiff hairs (only faintly indicated in the
accompanying figure); this character seems, however, to vary to some extent; in one of the
specimens investigated these hairs were practically completely reduced. The other joints are smooth.
Second antenna: — Protopodite: Length, about 0,65 mm. The medial
distal bristle (fig. 6) has short hairs; it is moderately long, being about as long as the distal sensory
bristle of the endopodite. Exopodite (fig. 7): This has about the following proportions
between its joints:
I : Il : III : IV : V : VI : VII : VIII : IX = 28 : 10 : 6 : 4 : 4 : 3 : 3 : 3 : 2.
In other words the first joint is about as long as the total length of the five following joints,
the second is about that of the two following ones. The bristle of the second joint is only as
long as the total length of the three following joints or somewhat shorter; it is furnished ventrally
with a few, about seven to ten, rather strong spines. The longest natatory bristles are somewhat
longer than the exopodite; the proportion between these two lengths is about 85 : 70. The
natatory bristles have broad natatory hairs. The end joint has only three bristles, of which
the two ventral ones are long, powerful natatory bristles, developed to the same extent as those
on the preceding joints, the dorsal one is only about as long as the total length of the four distal
joints and has short, fine hairs. The third to the ninth joints have narrow and relatively short
basal spines, which decrease in strength the more proximally they are situated, the one on the
third joint being almost completely reduced. The endopodite (fig. 6) is unjointed and
* In this species I liave observed, as G. W. Müller previously did for other species (cf. G. W. Müller, 1906 b,
p. 16), that in a state of rest these bristles are bent posteriorly upwards along the dorsal side of the body inside the shell.
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