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homologization of the bristles, I have, for the sake of brevity, simply denoted the latter by
letters in the descriptions that follow.
First antenna: — The bristles on the original seventh joint: The one situated
anteriorly = „the a-bristle“; the one placed distally-medially and somewhat anteriorly = „the
b-bristle“; the posterior-distal one = „the c-bristle“. The four bristles on the original eighth
joint: The anterior of the two simple sensory filaments which are situated laterally, close to each
other, is called „the d-bristle“, the posterior one of them is called „the e-bristle“; of the two
distal-medial bristles, the anterior one is called „the f-bristle“, the posterior one = „the
g-bristle“; see the fig. 16 of this limb of Cypridma (Vargula) norvegica.
M a n d i b 1 e: — The ventral bristles on the basale have in the following descriptions
been denoted by the following letters: The group of bristles proximally-ventrally-medially
= „the a-bristles“; the solitary bristle, somewhat distally of this group = „the b-bristle“;
the bristles situated somewhat proximally of the middle of the joint = „the e-bristles“; those
situated somewhat distally of the middle of the joint = „the d-bristles“. Of the bristles on the
second endopodite joint the comparatively short ones, armed with more or less powerful
secondary bristles and situated anteriorly-medially on the joint are called after what is presumably
their fonction often simply „cleaning bristles“.
Maxilla: — Bristles of the end joint: The group whose (often four) bristles
form a row placed across the ou tside of the joint, somewhat posteriorly and somewhat
proximallv to the distal edge of the joint is called „a-bristles“; the group distally
-anteriorly = „b-bristles“ ; the group distally-medially, somewhat behind the last-mentioned
group = „c-bristles“; the remaining bristles, situated posteriorly-distally on the joint,
somewhat laterally = „d-bristles“.
Fifth limb: —- Second joint of the exopodite: The bristles in the group which
was interpreted by Gr. W. MÜLLER as a „tooth“, comparable morphologically with the „main
tooth“ on the preceding joint, are called „a-bristles“; the irregulär group of bristles somewhat
outside and in front of the „a-bristles“ = ,,b-bristles“; the single bristle close to this group
on the posterior side of the joint = „c-bristle“; the bristle on the anterior side of the joint
close to the third exopodite joint = „d-bristle“.
Seventh limb: — Of the teeth of the end comb the distal ones, those of the more
or less extended type, are denoted „distal teeth“, the ones situated proximally to the former
are called „proximal teeth“.
Remarks: — Although a great number of the forms of this sub-family that have hitherto
been introduced into the literature are very incompletely and vaguely described, we may, all
the same, say with rather great certainty even now that. this group is, from a
classi-ficatory point of view, to be regarded as being fairly uniform. On the other hånd it must,
however, be pointed out that, compared with the sub-family Philomedinae, it comprises
rather heterogeneous elements.
Are the genera that have been so far established of this sub-family in their
modern conception to be looked upon as natural, well-defined systematic units?
Arc tlie genera
natural units’’
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