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identifiée! with the exopodite and the endopodite. One of tliese is very powerful, with strong
musculature, in most cases with two or three joints, and armed with mimerons bristles, which
are most frequently strong. The other is considerably less voluminous, even rather small in
the sub-family Philomedinae, hyaline and weak, unjointed and only furnished with a few bristles;
there are no muscles in this process, which is moved only by muscles attached at its base.
Eig. III. — Maxilla. I. Polycopsis siwrala G. \\ . Mi i.t.er. 2. Polycope rostrnta G. \V. Muller. 3. Diagram of thesub-fam.
Cypridininae. V Diagram ol the genus Asierope. (From G. W. Müller, 1894; ros. 3. and 4. are somewhat altered).
In all the species of the family Cypridinidae which were investigated by me and of which
descriptions are given in this work, the latter appendage has only three bristles, all of which
are placed near its distal end and which are almost always of the same type, rather long
and weak, in most cases finely plumons, a uniformity that may perhaps be considered to
indicate a great phylogenetic age. In the family Sarsiellidae this appendage seems, if one
is to judge both from G. O. Sars’s and G. W. MÜLLer’s drawings, to be still weaker than
in tin; sub-family Cypridininae; among other things it always seems to be provided with
only two distal bristles.
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