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Synonyms.
Description: — See 0. CLAUS 1891a, p. 60 and G. W. MÜLLER, 1906a, p. 101.
Supplementnry description: — Female: —
S li e 1 1: — Length : According to C. Claus 1,5—1,6 mm. According to C. W. MÜLLER
1,65—1,8 mm. According to G. H. Fowler 1,4—1,7 mm. The female investigated by me
was 1,6 mm. long. The shape of the shell was as described by G. W. Müller. The surface of
the shell was bare. The selvage was as in C. lophura. The glands along the posterior margin
of the shell and the hinge were the same as in C. lophura. In other respects it agreed with
G. \V. MüLLER’s account.
The first antenna was similar to that of C. parvidentata, but the distal joints
mi the specimen investigated by me were bare. In addition this specimen had no small
yellowish-brown corpuscles in the first and second joints.
Second antenna: — Similar to that of C. parvidentata, but the armature on the
a-bristle was almost as powerful as that on the b-bristle. There was no c- or d-bristle.
M a n d i b 1 e : — The protopodite and the epipodial appendage are
similar to those of C. lophura. The endopodite is perhaps somewhat more elongated
than in the species just mentioned. Its first joint has only two bristles on the posterior side;
both these bristles have short hairs; one of them corresponds in position and size to the lateral
one, the other to one of the three medial ones, of the corresponding bristles in C. lophura. It
is to be noted that in pi. A I, lig. 7, C. Claus, 1891 a, there are three bristles at the
corresponding place, one long one and two short ones.
The maxilla, the f i f t h and s i x t h 1 i m b s, the furca and the r
odsha p e d organ are similar to those of C. parvidentata.
Upper 1 i p : — The part between the combs is of about the same type as in my fig. 4
of C. Belgicae. The par agn a tes are similar to those of C. symmetrica.
Remarks: — Besides the places given in the above list of synonyms C. hyalophyllum is
mentioned in the following places: G. S. Brady, 1902 a, p. 199 (= the same author, 1903,
pp. 337, 338, 339 and A. M. Norman, 1905, p. 155) and G. H. Fowler, 1903, p. 121. These
statements are not accompanied by any verificatory information or figures. On account oi
the great difficulty in determining with certainty the species of this group it did not seem to
me proper to include these statements in the list given above.
C. hyalophyllum, Ch. JUDAY, 1906, p. 20 is certainly not identical with C. hyalophyllum
C. CLAUS. It is perhaps identical with the former author’s C. magna; cf. p. 692 above.
With regard to C. hyalophyllum, G. H. FOWLER, 1909 I refer to what is written on p. 565
above. 1 was unable to discover in the specimen investigated by me any lateral glands with
exits such as are shown in this writer’s pi. XX, fig. 97.
Habitat: — Antarctic Ocean:
S. A. E.. Bl. station 64 b, lat. 48° 27’ >S., long. 42" 36’ W.; depth 2500—0 m.; 23. VI. 1902:
1 mature female; on slides, R. M. S.
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