KONGL. SV. VET. AKADEMIENS HANDL1NGAR. BAND. 22. N:0 7. 371 



The female. 



PI. XVI, fig. 8—18. 



The perceon. The third segment is shorter than the first two together; the seventh 

 segment is as long as the three preceding together. 



The first and second pairs of perceopoda, (PL XVI, fig. 10 — 12) are like those in 

 the preceding species in shape, but the femur is much longer than the three following 

 joints together. 



The third, and fourth pairs (PI. XVI, fig. 13 and 14). The lower hind corner of 

 the femur, as well as that of the genu, projects into a sharp point. The front margin 

 of the tibia, carpus, and metacarpus is fringed with minute spines. The lower front 

 corner of the metacarpus is produced into an elongate-triangular, sharp-pointed process 

 in front of the curved dactylus. 



The fifth pair (PI. XVI, fig. 15) are only a little longer than the fourth. The fe- 

 mur is feebly bent in the shape of a S, with the upper half of the front margin concave, 

 and the lower half feebly convex: the lower front corner is angular and sharp-pointed; 

 the upper part of the hind margin is strongly convex, the lower part excavated, and near 

 the lower corner produced into a tolerably long and sharp-pointed process. The lower 

 front corner of the genu projects into a sharp point. The stem of the carpus is 

 elongated, but not twice as long as broad; the carpal process is more than twice as long 

 as the tubercle on the under margin of the carpus, and scarcely a third part as long as 

 the stem of the joint. The tubercle on the under margin is slightly incised at the top, 

 but not two-pointed, and not distinctly crenulated. The metacarpus is arched, nearly 

 as long as the stem of the carpus, and provided with a broad faintly crenulated tubercle 

 at the middle of the front margin. A dactylus is present only in the younger spe- 

 cimens. 



The sixth pair (PI. XVI, fig. 16) reach beyond the apex of the carpus of the fifth 

 pair. The femur is straight, with the lower front corner produced into a sharp-pointed, 

 feebly curved process; the femur is fully as long as the three following joints together. 

 The lower front corner of the genu projects into a sharp point, as does also the upper 

 front corner of the tibia. The metacarpus is more than half as long as the carpus. 



The seventh pair (PI. XVI, fig. 17) are shorter than the sixth. The femur is more 

 than a third part longer than the femur in the sixth pair, nearly twice as long as all 

 the following joints together, and about six times as long as broad; it has the lower front 

 corner produced and sharp-pointed as in the sixth pair. The genu and tibia are armed 

 as in the preceding pair. The carpus equals a fourth part of the length of the femur, 

 but is not twice as long as the metacarpus. 



The pleonal segments have the lower hind corner angular but not produced. 



The uropoda. The first pair do not reach to the apex of the last; the peduncle is 

 more than twice as long as the equal rami. The second pair reach only a little beyond 

 the apex of the peduncle of the first pair, but do not attain the apex of the peduncle of 

 the third pair; the inner ramus is narrower, and considerably shorter, than the outer. 



