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joints. The a-claw is smooth. The c-bristle lias four or five, usuallv five filaments, the
f-bristle has four or five filaments and the g-bristle lias six filaments.
Second antenna: — This is like that of A. Mülleri. The fourth to the ninth
joints on the exopodite have basal spines. The e n d o p odite is rather distinctly
threejointed; its end bristle is about as long as or slightly longer than the stem.
Mandi b le: — Protopodite: Coxale: The scythe-shaped process (fig. 6) is
very like this process in A. Mülleri. It is to be noted: The dorsal serrate teeth, although very
small, arc perhaps slightly more strongly developed than in the species mentioned. Basale:
The backward pointing process has four distal bristles, four or five triaena bristles and, as
in the preceding species, only one dwarf bristle. On the triaena bristles were observed from
two to five pairs of spines below the distal pair. The glands emerge on a rather well developed
peg, but this is not so large as in fig. 9 of A. spinifera. The dorsal side of this joint is quite
smooth, without either hairs or bristles. The exopodite (fig. 5) is rather powerful; if its
end bristles are included, it is about as long as or slightly more than three-quarters of the length
of the anterior side of the first endopodite joint. E n d o p o d i t e (figs. 5 and 7): The shortest
one of the three ventral bristles of the first joint has short hairs; the two others have a few pairs
of short secondary bristles proximally of the long secondary bristles. This joint is not armed
with any chitinous spines antero-distally. The second joint has only one proximal brist le, which
is somewhat less than a thircl of the length of the main bristle a. Between the main bristles
b and c there is a long, narrow bristle with short hairs. The medial cleaning bristles vary to
some extent; they are rather numerous and are arranged in two rows; six specimens that were
investigated showed the following conditions:
(7 bristles in a distinct lower row.
type specimen:
Right and left mandible j ’’ ’* ” U^Jl ”
l 2 ,, inside the main bristle b.
Specimen no. 2.
Right and left mandible
( As in the type specimen; the lower row was, however, less
l distinet, its inner bristles were somewhat dislocated.
Specimen no. .’5. Right
„ Left
4. Right
Left
(
mandible [
(
I
I
7 bristles in a distinet lower row.
8 „ „ „ upper „
1 bristle close to the main bristle b.
7 bristles in a distinet lower row.
6 „ „ ., „ upper „
2 ,, inside the main bristle b.
7 ,, in a distinet lower row.
fi „ „ „ „ upper „
3 ., ,, ,, ,, row inside the main bristle b.
7 ,, ,, ,, ,, lower row.
fi ,, ,, ., ,. upper ,,
2 .. above bristles nos. 1 and 3 of the latter row.
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