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Distribution: — Atlantic Ocean between lat. 46" N. (G. H. Füwler) and lat. 36" S.
(G. W. Müller). Indian Ocean (G. \\. MÜLLER).
The female described above was consequently caught somewhat south of the previously
known distributional area.
Conchoecia subarcuata C. Claus.
Conchoecia subarcuata, C. CLAUS, 1890. p. 9.
,, striata, ,, ,, 1890, p. 12.
,, subarcuata, ,, „ 1891 a, p. 58; pl. III, figs. 3—9; pl. IV.
,, striata, ,, ,, 1891a, p. 62; pl. VIII, figs. 1- 6.
,, subarcuata, G. S. Brady and A. M. Norman. 1896, p. 691 (= a reproduction
of the original description).
„ „ G. W. Müller, 1906 a, p. 102; pl. XXI, figs. 10—16, 19.
,, ,, „ ,. ,, 1906 b, p. 7.
„ „ ,, ,, ., 1908, p. 74.
„ „ „ „ „ 1912, p. 83.
Description: — See C. CLAUS, 1891a, p. 58 and G. W. Müller, 1906 a, p. 102.
Supplementär y description: — Male: —
Shell: — Length: According to G. V. Müller, 1,8—2 mm. The specimen investigated
by me measured 1,8 mm. The shape, as G. W. MÜLLER pointed out, agrees closely with C.
lophura. The surface of the shell is bare. The selvage, the glands along the posterior margin
of the shell and the hinge are also similar to those of C. lophura. The compound glands are of
the type described by G. \Y. MÜLLER; for other characters see this author’s work.
First antenna: — This is of the same type as in C. lophura, but the armature
of the e-bristle is different; cf. G. W. MÜLLER; in the specimen investigated by me I counted
nineteen or twenty spines in each row; a number of these were arranged in pairs and some
alter-nated more or less distinctly. The anterior side of this bristle was, as far as I eould see, quite bare.
Second antenna: — The protopo dite and the exopodite are of
the saine type as in C. lophura, but the first exopodite joint is almost bare. E n d o p o dite:
This is of the same type as in C. lophura. First joint: The a-bristle is bare or lias some short
hairs at the middle; the b-bristle is also bare, and has only about three or four long hairs just
proximally of the middle. The e-bristle was not developed in the specimen investigated by me.
Mandible (fig. 1): — Of the same type as in C. hyalophyllum, but the first
endo-podite joint is furnished on its posterior side with three bristles, all of which have short hairs;
these three bristles correspond in position and size to the long lateral bristle and two of the medial
ones in my fig. 22 of C. symmetrica.
The in axilla and the f i f t h and s i x t li limbs are similar to those of C. lophura.
Penis: — Of about the same type as in C. lophura ; its copulatory appendage is
somewhat smaller; cf. the aceompanying fig. 2.
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