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process has three short, strong bristles distally. Basale: The backward pointing process has
four distal bristles, three or four triaena bristles and two dwarf bristles. The triaena bristles
have from two to hve pairs of secondary spines beneath the distal pair of spines. The glands
issue on an almost entirely reduced peg. At about the middle of the dorsal side of this joint
there is a single bristle, which is about half as long as the dorsal side of this joint; this bristle
has short, fine hairs distally. On the outside of this joint there are also groups of short, sti ff
hairs dorsally, some of which, at least, are rather coarse. The e x o p o d i t e is, if its two
distal bristles are included, somewhat more than two thirds of the length of the anterior side
of the first endopodite joint. Endopodite: First joint: The shortest of the three ventral
bristles has only short secondary bristles. The longest of these bristles is armed with about
nine short secondary bristles proximally of the long secondary bristles; the next longest of these
bristles has no such short proximal secondary bristles. This joint has no spines antero-distally.
The second joint has one proximal bristle, which is about a third of the length of the main bristle a.
Proximally of this proximal bristle there is a group of short, fine hairs. Between the main bristles
b and c there is no long, narrow bristle with short hairs. The medial cleaning bristles are rather
numerous, varying somewhat in number (fig. 13); three specimens that were investigatecl
showed the folio wing conditions:
Sars’s specimen. Right mandible
6 bristles in a distinct lower row.
4 „ » „ „ i’PPer »
1 bristle close to the main bristle b.
1 ,, between the main bristles a and b
Le ft
6 bristles in a distinct lower row.
1 bristle above bristles nos. 5 and 6 in this row.
3 bristles in a distinct upper row.
2 ,, near the main bristle b.
1 bristle between the main bristles a and b.
I 7 bristles in a distinct lower row.
Specimen 2 Right and left j 4 ,, ,, ,, ,, upper ,, •
(from Bohuslän). mandibles 2 ,, near the main bristle b.
( 1 brjstle between the main bristles a and b.
f 7 bristles in a distinct lower row.
Specimen 3 Right and left J 4 ,, ,, ,, ,, upper ,,
(from Bohuslän). mandibles j 1 bristle near the main bristle b.
(1 ,, between the main bristles a and b.
The end claw is somewhat longer relatively than in A. Grimaldi, about as long as or
slightly longer than the anterior side of the first endopodite joint; it is smooth.
Maxilla (fig. 14): — Pr o to pod i te: The distal endite is armed with three
subequal bristles. The dorso-proximal bristle is relatively short. The basale has one ventral
bristle of moderate length and a series of hve subequal dorso-distal bristles, jwhich are in most
cases somewhat shorter than the ventral bristle. The short ventero-distal bristle is developed.
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