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endites) than the former; the distal and the medial bristles generally are of different types.
Distally on the posterior edge the protopodite has a reduced epipodial appendage,
generally represented only by a small number of short bristles. Exopodite: The proximal
joint is comparatively short, well defined both from the protopodite and from the distal exopodite
joint; it is armed on the anterior edge with a powerfnl endite, most frequently of about the same
type as the distal endite of the protopodite. The distal exopodite joint varies somewhat in shape
and size; furnished with a varying number of bristles along the ventral edge; of these bristles the
posterior-distal ones are most often of a type differing somewhat from the rest inasmuch as they
are densely plumose along almost their whole length. Sometimes this joint has a trace of an endite
on the anterior edge; most frequently, however, it is quite without anything of this sort. The
bristles of this limb seem to be subject to a somewhat greater variation than the bristles on the
preceding limbs.
For the differences in the interpretation of the various parts of this limb in preceding
authors and in the present work see p. 47 above.
Seven th limb: — Without or with rather weak sexual dimorphism. — Armed
distally with an unpaired comb, which is comparatively constant in type, is placed
longitu-dinally, is more or less horse-shoe shaped and most frequently rather powerful; when the limb
is held in its natural position of rest, i. e. directed upwards and curved backwards, the points
of the teeth of the comb are directed upwards.
The brush-shaped organ is lacking almost througkout.
Penis varying in type.
The upper 1 i p varies in size and type, with a glandular field of varying size.
Gi lis are exceedingly seldom developed; situated dorsally at the back of the body.
Special terminology: — M a n d i b 1 e: — The two bristles situated dorso-distally on the
basale are simply called: „the dorso-distal bristles“.
Fif th limb: — The large tooth on the first exopodite joint, composed of several
teeth placed in a row, is called „the main tooth“.
S i X t h limb: — Of the bristles of the endites the distal ones (distal-proximal is
measured from the top of the endite to its base) are called „distal bristles’’, those placed
medially, often somewhat proximally to the former, „medial bristles".
Remarks: — I have had some doubt as to which of the two sub-families Cypridininae
and Philomedinae should be placed first. In other words, which of these two groups is
be regarded as the most primitive?
It is certainly true that in several respects the sub-family Philomedinae is probably
more primitive than the sub-family Cypridininae. Among its primitive characters may be
mentioned :
the absence of suctorial organs on the end bristles of the male’s first antenna,
the differentiation of the endopodite of the second antenna in the male into an organ
for seizing the female,
Zoolog, bidrag, Uppsala. Supp!.-Bd. X.
Saturai
arrangement of the Uvo
sub-families.
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