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curves, are found both on the latéral and the medial sides of the process; they are, however,
very much more numerous on the lateral side. The striatory systems of the two sides cross,
because the striations on the medial side, which are also distinguished by having somewhat
coarser hairs, form a more acute angle to the longitudinal axis of the process. I have
obser-ved, however, that the two systems join each otter, at least on the dorsal edge of the process.
The distal part of the process has no striations; this part is covered laterally by a mat
-in most cases very thick — of short, very fine hairs. There are also often short, fine
hairs on the bristle of the dorsal edge. In addition there are sonie transverse rows of rather
short, fine hairs laterally-ventrally somewhat proximally of the middle of the process. Some
irregulär lists (strengthening lists according to G. \\. MÜLLER, 1894, p. 49) run in the longitudinal
direction of the process; these are in most cases not drawn at all in the figures given in this work
of mine. The rod-shaped process is rather narrow, not quite half as long as the scythe-shaped
process. Along the greater part of its length it is furnished with rather short, strong bristles;
on both the medial and the lateral sides of the process most of these bristles are arranged in
a rather small number (about three to six) of transverse rows; the ventral bristle in each row is
in most cases the longest, the others decrease fairly uniformly in length dorsally. The rod-shaped
process is blunt distally and is provided there with three or four short spines or bristles. Basale:
The backward pointing process is well developed and is furnished with a rather small number of
bristles (from six to eleven were observed on the species investigated by me). Of these bristles
the three or four nearest to the point of the process are rather long andpowerful and are
character-ized by having numerous short secondary spines, arranged in two rows and placed close together,
along the greater part of their length; these spines are rather powerful proximally and become
more and more fine distally (ci. fig. 9 of A. spinifera). From one to five, in most cases from
three to five, of the other bristles are also most frequently rather long and powerful and are
characterized by having a greater or less number of secondary spines, arranged in two rows
and situated close together distally; the distal pair of these spines is the most powerful, extending
no inconsiderable distance distally of-the point of the bristle; the others are rather short. The
remaining one or two bristles are short and weak, bare or provided with exceedingly fine, short
hairs. In the neighbourhood of these bristles a rather large number of unicellular glands have
their openings on a more or less developed verruciform process. Dorso-distally this joint always
has two bristles with more or less short hairs; these bristles are, as a rule, considerably longer
than the anterior side of the first endopodite joint. Apart from these the dorsal side of the
second protopodite joint is quite without bristles in a number of species, in others it lias a larger
or smaller number of these, characteristic for the species. Exopodite: The two
ventero-distal bristles of this brandi are always very short. This brandi is furnished dorsally with
exceedingly numerous short, fine hairs (the exits of the glands). E n d opodite: The first
joint has only three ventral bristles. Of these the two posterior ones especially are very long;
they are in most cases somewhat longer than the anterior side of the endopodite and are always
furnished at the middle with a number of rather long and powerful anterior secondary bristles,
arranged in two rows; proximalIv of these secondary bristles there is in a number of species a
varying number of short secondary bristles; these two bristles have short, fine hairs distally. The
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