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portion between the joints seems to be fairly constant; the following figures may be given to
illustrate it (from a specimen of Ph. (Ph.) globosa,):
Pr. I ff, Pr. II1. End. l\l End. lig, End. III f.
(It thus dillers from the mandible in Cypridininae espeeially by the relativelv great lengtli
of the first endopodite joint and the relative shortness of the second endopodite joint.) P r o t
o-p o d i t e: The endite of the coxale is moderately large but very powerful and is deeply
bil’ur-cated distally; the two main points are rather strongly chitinized, well pointed and most
frequently furnished with some moderately strong secondary spines (see tig. 8 of Ph.
(Sclero-concha) Appellöfi); it is furnished with a moderate number of rather long and stilf hairs arranged
in a few groups; in addition it has proximally-laterally a single short bristle, apart from whicli
this joint has no bristles. Basale: ( )n the inside of the proximal half of the joint there is a group
of rather short bristles, some of which are powerful; in all the species of this genus that are
dealt with in this treatise this group had six bristles, three of which were powerful, furnished
with powerful secondary teetli, the three otliers were moderately strong and had a wreath of
long, stilf secondary bristles at the middle and short hairs distally. Scattered along the ventral
side of this joint there is a somewhat varying number of bristles; in the species investigated
by me from six to twelve bristles were observed at this place, all of the same type, having one
or a few wreaths of long, stilf secondary bristles at the middle and short hairs distally, of moderate
lengtli or rather long. Dorsallv this joint has a varying number of rather long bristles, two
of which are always situated distally close to each other. The exopodite is, in most cases,
somewhat shorter than the dorsal side of the first endopodite joint. It is drawn out to a rather
fine point and has dorso-distally a sort of cushion of exceedingly fine hairs situated close together
(the mouths of a gland). Endopodite: The first joint has four ventral distal bristles,
some or all of which are long. Second joint: On the anterior side this joint has a number of
bristles, situated in two more ôr less distinct groups, one of which is placed about half-way
along the joint, the other somewhat proximally of this. The bristles in the latter group seem
to vary rather considerably in number and type. The former group, on the other hånd, had,
in all the species investigated by me, six bristles, all rather long but differing somewhat in lengtli,
the longest ones often about as long as the joint, and with one or a few wreaths of long, sti ff
secondary bristles at the middle and very fine, short hairs distally. Postero-distally this joint
has two groups of bristles, one situated somewhat proximally of the other. Both groups consist
of three moderately long and moderately strong bristles, about subequal and furnished with
short hairs; those in the distal group are somewhat shorter than those in the proximal group.
The end joint has seven bristles. In all the species investigated by me the.se were developed
in about the following way: The two middle ones were developed as long, powerful and
somewhat curved claws, the lateral one of which — which is somewhat longer than the other
-often as long as the second endopodite joint. Of the two anterior bristles one is rather powerful,
almost as strong as the middle claws but rather considerably shorter than these, the other is
weak and in most cases somewhat shorter than the first-mentioned one. The three posterior
bristles are all weak and of somewhat different lengths, the longest one somewhat shorter than
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