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are bare. Yellowish-brown corpuscles of pigment are found at least in the proximal part of
this antenna.
Second antenna: — The endopodite isof the same type as in C. rotundata,
but I never found either of the c- and d-bristles developed.
S i X t h 1 i m b : — Of about the same type as in C. rotundata.
Rod-shaped organ: — This is sometimes of the type described and reproduced
by G. W. MÜLLER, sometimes somewhat pointed distally; cf. the accompanying fig. 6.
Habitat: — Antarctic Ocean:
S. A. E., PI. station 317, lat. 53° 0’S., long. 48° 27’ W. ; depth, 250—0 m. ; 17. IV. 1902;
temperature at 250 m. and at the surface, + 3°,40 C. and + 1°,30 C. : 1 mature female; R. M.
S. 340. S. A. E., PI. station 318; at the same locality; depth, 500—0 m.; 17. IV. 1902;
temperature at 500 m., -f 1°,50 C.: 1 mature female; R. M. S. 341. S. A. E., PI. station 44 b,
lat. 65° 56’ S., long. 54° 35’ W.; depth, 700—0 m.; 22. I. 1902; temperature at the surface
— 1°,15 C. : 3 mature males 4 mature females and 1 juvenis; R. M. S. 239.
Distribution: — In the Antarctic Océan S. of lat. 550 S.
A couple of my above-mentioned finds thus corne from localities somewhat north of the
previously known region of distribution.
Curta group G. W. Müller.
(Mikroconchoecia C. CLAUS.)
This group, which includes two forms in addition to the two dealt with below, is certainly
quite a natural one. The careful comparative investigation to which I subjected the two
following species affords, at any rate, very strong evidence in favour of this.
Conchoecia curta J. Lubbock.
For s y n o n y m y see G. W. MÜLLER, 1906 a, p. 86.
Description: — C. ClalS, 1891 a, p. 73; pi. XX and G. W. MÜLLER, 1906 a, p. 86; pi. XXX,
figs. 1—9.
Supplementär >j description: — Male: —
Shell: — Length: According to G. W. MÜLLER, 0,75—0,95 mm. The specimens
investigated by me measured 0,7—0,9 mm. Length : height about 1,6 : 1; length : breadth
about 1,75 : 1. Seen from the side it is of the type described and reproduced by
G. W. MÜLLER; cf. the accompanying fig. 1. Seen f r o m b e 1 o w (fig. 2) it has its greatest
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