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of the species dealt with below, C. spinirostris, to the other species of this group. With regard
to this cf. p. 616 above.
Besides the forms included by G. W. Müller the species C. zetesios, established by
G. H. Fowler, 1909, also belongs to this group. This species cannot, however, be retained;
as I hope to be able to show in a following work, we are only concerned here with non-mature
individuals of C. macrocheira G. \V. Müller.
Conchoecia lophura G. W. Müller
Conchoecia lophura, G. W. MÜLLER, 1906 a, p. 99; pl. XX, ligs. 1—lo.
„ „ ,, „ ,, 1906 b, p. 6.
„ „ „ „ 1908, p. 73.
,, hyalophyllum (part.), G. H. Fowler, 1909, pp. ‘236, 265; pl. XIX, tigs. 90 to
92, 102; pl. XX. figs. 103, 104.
,, lophura, G. W. MÜLLER, 1912, p. 82.
Description: — See G. \\’. MÜLLER, 1906 a, p. 99.
Supplementary description: — Male: —
Shell: — Length: According to G. W. MÜLLER 2,2—2,8 mm. The specimen
investig-ated by me measured 2,65 mm. Length : height about 1,9 : 1; length : breadth about 2,1 : 1.
Seen from the side it is of about the type described and reproduced by G. W. MÜLLER;
cf. the accompanying fig. 1. Seen from below it has its greatest width at about the
middle and its anterior and posterior parts about equal in size. In front of the middle the side
contours are evenly curved, the anterior end is broadly rounded with a symmetrica] rostrum;
behind the middle the side contours are undulated in about the same way as in the accompanying
fig. 2, the posterior end is somewhat pointed. The surface of the shell is bare; no
sculpture was perceptible on the specimen investigated by me. Seen from inside:
Selvage: On the rostrum this is smooth-edged and without anv spine. Along the anterior margin
of the shell and the anterior half of the ventral margin it is extremely finelv serrulated, almost
smooth; along the posterior half of the ventral margin it is finely serrulated. Along the posterior
margin of the shell it is more or less coarsely and irregularly serrulated and scratched and partly
furnished with small leaf-like appendages of the type that is reproduced in my fig. 4 of C.
symmetrica. The glands are as described by G. \Y. Müller. The glands along the posterior margin
of the shell are of about the same type as has been described for C. G aussi, but the little group
of three or four glandular exits is absent. There is a rather well developed oval hinge-socket
and hinge-tooth at the posterior dorsal corner.
First antenna: — This is of the type described and reproduced bv G. \Y. MÜLLER;
in the specimen investigated by me the a-bristle was somewhat longer than the second joint
of this antenna (see the accompanying fig. 3). E-bristle; < )n the anterior side of this bristle
Zoolog, bidrag, Uppsala. Suppl.*Bd. 1.
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