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over large part of it, numerous, disposed in several rows and close together; the most distal 
ones form a slightly elongate tuft, with some of the hairs disposed along the upper margin. 
The hairs of the inner surface are short, curved and distinctly feathered; they form a kind 
of brush, falling over the edge of the labrum, when the palpi are not erect. 
Mandible (Pl. XVII, fig. 2) with the third tooth broad or thick, the 4 and 5 well- 
developed and pointed, the inferior angle represented by a very small, rudimentary tooth, or 
almost quite obsolete. Teeth 2—4 double. Distance between extremities of teeth 1 and 2 
considerably greater than that between teeth 2 and 3. 
Maxilla (Pl. XVII, fig. 3 and 3*) with the edge nearly straight. The upper pair of 
spines well-developed, the inferior pair not so conspicuous as in many other species, and situated 
at a considerable distance from the inferior angle. The inferior part not developed into a step- 
like projection. Beneath the upper pair a very small notch is seen, with a few hairs disposed 
at the bottom. Between the two pairs of somewhat larger spines the edge bears 4 pairs and 
one or two single, or 5 pairs of well-developed spines of nearly equal strength. The part of the 
edge behind the inferior pair of spines is furnished with a series of spine-like hairs. Upper and 
basal margins of the maxilla nearly parallel towards the extremity, distal part almost quadrate 
in consequence. | 
Outer maxillae (Pl. XVII, fig. 4). Outer lobe relatively short and broad; a large 
part of its anterior surface is furnished, as a rule, with short hairs; no longitudinal series ot 
hairs extends from the outer to the inner lobe. The latter bears feathered hairs, most of which 
are directed towards the interior and towards the basis of the maxilla. 
Cirri. First pair has the two rami very unequal, the one having 11, the longer ramus 
having 16 segments (the same cirrus of the other side in this specimen has 11 segments in 
both rami). In another specimen the numbers of the segments were 11 and 15 respectively in the 
one, and in the other cirrus 11 and 16. The segments of the shorter ramus are strongly protuberant. 
Second pair. Rami nearly equal, of 15 or 16 segments; segments very protuberant on 
their inner face, with dense tufts of hairs disposed on the protuberances. Both rami of this 
cirrus nearly straight. 
Third pair. Rami unequal, distinctly curved at the extremity, of 19 and 21 segments 
respectively. Protuberances flattened, furnished with brushes of less numerous, but longer hairs 
than on second cirrus. No trace of teeth along the protuberant parts of the segments. 
Fourth-sixth pair. Rami long: segments, although short, very numerous. In the sixth 
cirrus in one of the specimens, 50 segments can be counted in both rami. Their anterior 
margin is slightly protuberant and bears two. pairs of long spines, the distal pair of which is 
longer than the other pair (Pl. XVII, fig. 5). Two to three short stiff hairs form a little 
brush between the two spines of the distal pair, a couple of delicate hairs are situated in the 
same way between the spines of the shorter pair. On some of the segments, a third pair of . 
microscopical spines (hairs) could be made out — but not on all. The number of segments 
in the 6 cirrus of a smaller specimen is about 44. 
Penis with characteristic point near basis well-developed. Basal part very thick, ter- 
minal part narrower, tapering towards the extremity. Length moderate. 
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