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area (fig. 1b) broader than the head (fig. 4a), a little broader than long, and consisting of a 
somewhat angular chitinous plate, which has a membranous part outside and behind the 
genital apertures. These apertures are somewhat curved, their direction is approximately 
parallel with the median line of the animal; their distance from each other is less than 
moderately great, and they are situated somewhat in front of the posterior margin of the 
area, but behind the middle of it. The whole area is naked, and I have been unable to 
find caudal stylets. In the middle of the area we see the orifices (0) of the receptacula 
seminis, one of which (r) is represented by a dotted line. 
MALE. The only specimen is ‘166mm. long and almost as broad (fig. 1¢ and 1d); 
though actually small, compared with the female, it is more than middle-sized (fig. 4b: 
fig. 4a). Seen from below, in general shape and in most details it resembles the male of the 
previous species. The head a trifle larger than the trunk. The frontal margin is naked. 
The antennule proportionally long, slender, with long sete. The antenne and the maxillule 
much as in the previous species; the mouth small. The maxille differ from all other species 
in the structure of the basal joint, which in its distal part close to the boundary between 
the inner side and the posterior side is provided with a protruding plate, the margin of 
which runs out into a number of spiniform, partly somewhat curved processes; the claw can 
be folded up along the inner side of this plate, which is very conspicuous in a lateral view 
of the animal (fig. 1d); the basal joint, besides, has a knot-like protuberance on its outer 
side. The mavxillipeds are long; their basal joint has a sinuate inner margin and several 
shorter and longer transverse rows of moderately long hairs on the anterior surface; the 
terminal joint seems to be bifid at its apex. The sub-median skeleton has only the same two 
pairs of processes as the preceding species, the first pair somewhat produced and rounded, 
the second pair comparatively close to each other, rather short, triangular, pointed, slightly 
diverging. The ear-shaped arch surrounding the base of the antennula is furnished with 
hairs of medium length, and from that point the hair-covering continues in a broad stripe of 
similar hairs along the whole length of the outside of the protruding lateral border of the 
head; from the posterior angle of this border a fringe of particularly long hairs runs upward 
and backward across the side and the back in a very slanting line. On the back behind 
this line we find the usual naked area, which indeed is rather long, but much narrower than 
in the preceding species; the remainder of the back, the sides, the posterior end and the 
ventral surface are rather densely covered with hairs of medium length. The hollow spaces 
beneath the skin of the head as in the preceding species. The first pair of legs much as 
in S. intermedia, except that there is a shorter process on the exterior side of the branch 
near its base, and the terminal seta is a little shorter than the basal joint of the maxillipeds. 
The second pair of legs also much as in the preceding species, but the outer branch is 
reduced to a smaller excrescence; the terminal seta of similar length to the first pair of 
legs. The caudal stylets rather thick; the terminal seta quite the length of those of the legs. 
