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Furca: — This seems to have no unpaired bristle behind the claws.
Rod-shaped organ: — The shaft reaches to about the distal boundary of the
second joint of the first antenna. The capitulum is somewhat shorter than the joint just
mentioned; its type in the specimen investigated by me was about intermediate between
pi. XXXI, figs. 24 and 25, G. W. MULLER, 1906 a.
The u p p e r 1 i p and paragnates are about the same as in C. symmetrica.
F e m a 1 e: —
Shell: — Length: According to G. W. MULLER, 2,0—2,4 mm. The specimens
investigated by me measured 2,0—2,45 mm. Length : height is about 3:1; length : breadth about
3,4 : 1. Seen f r o ni the side (see the accompanying fig. 2) it is of about the type
de-scribed and reproduced by G. W. MUller. Seen from bene at h it has its greatest width
at about the middle and the anterior part not at all or only slightly larger than the posterior
part; the side contours are rather evenly curved, the anterior and posterior ends are
pointed, the rostrum is unsymmetrical and not inconsiderably larger on the left valve
than on the right; cf. the accompanying fig. 3. Both the right and the left valve are
drawn out posteriorly into a not inconsiderable point, the one on the right valve being
in most cases considerably more powerful than the one on the left (G. \V. MULLER states
the contrary). Just in front of this point there are sometimes on the right valve (as
in the male) one or two more or less power fully developed spines; see the accompanying
fig. 4; sometimes there are no such spines at all. (G. W. MÜLLER does not mention these
spines.) The glands are the same as are described by G. W. MULLER. In other respects this
organ is like that of the male.
First antenna: — The first joint is about one and a half times the length of the
second joint and shows signs of being divided into two joints. The joint division is otherwise
very slight. The bristle on the second joint has short hairs and is somewhat longer than the
capitulum of the rod-shaped organ (see fig. 5). E-bristle: This is about one and a half times
as long as this limb or somewhat shorter; proximally on its anterior side it is furnished with
sparse short secondary bristles. The a-, b-, c- and d-bristles are subequal, not inconsiderably
less than half the length of the e-bristle. All the joints are bare. There are small
yellowish-brown corpuscles in the second joint.
Second antenna: — Protopodite: In specimens 2,3 mm. long this measured
0,8 mm. The exopodite is about the same as in the male. Endopodite: This has
three joints; the third joint is more or less well defined. The a- and b-bristles are like those
of the male. There are no c-, d- and e-bristles. The f-bristle is somewhat shorter relatively
than in the male, but in other respects the end-bristles on this branch agree fairly well in
both sexes. There is a small papilla between the h- and i-bristles. The second endopodite
joint is bare.
S i X t h limb: — First exopodite joint: The dorso-distal bristle is very short.
The dorso-lateral bristle on this joint is also somewhat shorter relatively than in mv fig. 30
of C. symmetrica, The dorsal bristle of the end joint is sometimes evcn somewhat longer than
the middle claw.
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