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area (fig. lb) broader than tlie head (tig. 4a), a little broader than long, and consisting of a 

 somewhat angular chitinous plate, which has a nienibranons 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 beliind 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 (o) of the receptacula 

 seminis, one of wliich (r) is represented by a dotted line. 



MALE. The only specimen is -166 mm. long and almost as broad (fig. Ic and Id); 

 though actually small, compared with the female, it is more than middle-sized (fig. 4 b : 

 fig. 4 a). 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 antennulse proportionally long, slender, with long setae. The antennae and the maxillulse 

 nnich as in the previous species; the mouth small. The maxillae 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. 1 d) ; the basal joint, besides, has a knotrlike protuberance on its outer 

 side. The maxillipeds 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 nari'ower 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. 



