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in most cases to be somewhat smaller. In other respects the pars incisiva agrees with the same
organ in C. rotundata. Basale: Of the six teeth on the distal edge of the endite the five anterior
ones are rather powerfully serrulated, the sixth is only slightly serrulated or is quite smooth.
Both the appendages behind these six teeth are of the tube-bristle type. The single tooth on the
outside of this endite is very small, about as large as the distal teeth. The bristles of this joint
are like those of C. rotundata and as in the species mentioned, no epipodial appendage is
developed. Endopodite: The first joint has only one posterior bristle, wliich has short
hairs, is about as long as the anterior side of this joint and is situated somewhat laterally.
Second joint: Of the three anterior bristles the two shorter ones are often subequal and about
as long as the anterior side of the two distal joints or somewhat shorter. Of the two posterior
bristles on this joint the longer one is in most cases about as long as the two shorter anterior
ones, the other is about half as long or somewhat longer.
Maxilla: — This is of the same type as in C. rotundata.
F i f t h 1 i m b: — Of the same type as in C. rotundata, but sometimes all the bristles
on the endopodite and the dorso-lateral bristle of the first exopodite joint have short hairs;
sometimes one of the ventero-proximal bristles on the first exopodite joint may be furnished
«
with long hairs.
Sixth li mb: — Endopodite: Both the bristles sometimes have short hairs;
sometimes, however, both are even furnished with rather long hairs. Exopodite:
First joint: This has the same bristles as in C. symmetrica, but has no dorso-distal bristle. The
bristles are of about the same relative length as in the species mentioned or sometimes somewhat
longer; they are either all furnished with rather long hairs or else one or two of them
have short hairs. Third joint: The dorsal bristle is relatively long, often about twice as long as
the ventral one.
Penis: — This is of the type usual in this genus. At about or somewhat distally of
the middle there are about four oblique transverse muscles, distally of which there are no
muscles. In the three specimens investigated by me the bent distal part of the vas deferens
was twisted forward in the way shown in the accompanying fig. 5. There seems to be no sign
of any copulatory appendage. ,
The furca, u p p e r 1 i p and para g nates are similar to those of C. rotundata.
Rod-shaped organ: •— The shaft reaches to about the distal bo und a ry of the second
joint of the first antenna or somewhat farther. The capitulum is of the type reproduced by
G. W. MÜLLER; it is about as long as the second joint of the first antenna.
F e m a 1 e: —
Shell: — Length: According to G. W. MÜLLER, „ziemlich konstant 1,07 mm“. The
specimens investigated by me measured 0,95—1 mm. Length : height about 1,8 : 1. Seen
f r o m the si d e it is of the type described by G. W. MÜLLER; cf. the accompanying fig. 1.
Seen from below it was of about the saine type as the male; cf. the accompanying fig. 2.
In other respects it was like that of the male.
First antenn a: — This is of the type reproduced by G. W. MÜLLER. 1 did not
succeed in tinding hairs on the anterior side of the proximal part of the e-bristle. All the joints
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