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relatively somewhat higher posteriorly, but otherwise it is of about the same type as in tlie
male. Seen from below it is of the same shape as in C. borealis.
In the case of the o t h e r organs it agreed with C. borealis.
Remarks: — As is seen above, this form is looked upon by G. W. Miller as a special
species. It seemed to me, on the contrary, best to put it as a variety of C. borealis G. (). Sars.
The differences that distinguish it from this form — the length and sculpture of the shell,
the number of spin.es on the e-bristle of the male first antenna and the armature on the d-bristle
of this limb — are so small that they seem to tue to form an adéquate argument in favour of
this alteration; cl, for instance, the difference between C. obtusata G. O. S ARS and its variet v
antarctica.
G. \Y. MÜLLER puts forward (1906 a, p. 111) a number of other differences between tliese
two forms besides those pointed out above. The explanation of this is probablv partly that
this writer had only maxima forms of C. borealis at his disposai and partly also his somewhat
deficient knowledge of this form.
Habitat: — A n t a r c t i c Ocean:
S. A. E., PI. station 64 b, lat. 48" 27’ S., long. 42" 36’ \V.; depth, 2500—0 ni.; 23. VI. 1902:
2 mature males, 16 mature females and 12 juvenes; R. M. S. 305, 306. S. A. E., PI. station
70 b, lat. 49" 56’ S., long. 49° 56’ W. ; depth, 2700—0 m. ; 27. VI. 1902; temperature at 2700 m.
and at the surface, + 1,67" C. and 3,40" C. resp. : 5 mature females and 4 juvenes; R. M. S. 307.
Distribution: — South Atlantic Ocean and Antarctic Ocean between lat. 1" S. and
lat. 65" S.
The finds of the ,,A n t a r c t i c“ are consequently made within the area of distribution
stated by G. W. MULLER.
Imbricata group G. W. Müller
(Conchoecissa C. Clals)*.
This group, comprising five species, is eertainly quite natural. I cannot say with certainty
whether C. prosadene G. \Y. MÜLLER belongs to it; it seems probable that it is not closely related
to these species.
Conchoecia symmetrica G. W. Müller.
Conchoecia symmetrica, G. W. MULLER, 1906 a, p. 117; pi. XXYll, figs. 7, 8, 13, 15, 16.
„ „ ., 1908, p. 78.
„ „ „ 1912, p. 90.
* G. O. Saks suggesteci-as early as 1887 that ,,Halocypris imbricata G. S. Brapy“ should be broken out as a
special genus, but all the same he did not make this himself.
Relation to
(’. borealis.
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