KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 22. N:0 7. 303 



The third and fourth pairs (PI. XIII, fig. 45). The femur is narrow, about three 

 times as long as broad, and nearly as long as the three following joints together. The 

 genu is as long as broad. The tibia is twice as long as the genu, and has the lower 

 front corner only a little produced. The carpus is about half as long again as it is 

 broad, a little narrower in the young, and has the hind margin faintly pectinated and 

 armed with long bristles. The metacarpus is thick and stout, and fully as long as the 

 carpus; the hind margin is pectinated; along the side runs a row of long, hair-like bristles. 

 The dactyl us is long and stout, about half as long as the metacarpus. 



The fifth pair (PI. XIII, fig. 46) are very long in the adult male, longer than the 

 head, peraeon, pleon, and urus together. The femur is almost linear, with the front 

 margin only feebly convex, and notched; it is about three times as long as broad. The 

 genu is a little longer than broad. The tibia is twice as long as the genu, and has the 

 lower hind corner only faintly produced; the front margin is finely pectinated, and set 

 with short spines. The carpus is only slowly tapering towards the apex; it is longer 

 than the femur, and nearly five times as long as broad at the middle; the front margin is 

 pectinated, and set with equidistant spines; the hind margin is feebly notched, and armed 

 with a few very short spines. The metacarpus in the adult male is perfectly straight, 

 rod-like, and much longer than the three preceding joints together; the lower half of the 

 front margin is pectinated, the long, slender, spine-like teeth forming the pectination are 

 set rectangularly to the joint; in the young the metacarpus is much shorter, curved, and 

 having the teeth of the pectination directed somewhat downwards; along the front margin 

 there is a row of bristles, like those in the preceding species. The dactyl us is smooth, 

 curved, and about a fifteenth part as long as the metacarpus in the adult male, and 

 comparatively much longer in the young. 



The sixth and seventh pairs. The femur is narrow, linear, and more than three 

 times as long as broad. The genu is as long as broad. The tibia is three times as 

 long as the genu; the front margin is armed with short spines; the hind margin is almost 

 smooth; the lower hind corner is only faintly produced. The carpus is much longer 

 than the tibia, but not twice as long; the front margin is set with longer and shorter 

 spines; the hind margin has a few minute spines. The metacarpus is stout, strongly 

 curved, longer than the femur, and nearly as long as the three preceding joints together; 

 the front margin in the sixth pair is minutely pectinated, and armed with spines; in the 

 seventh pair there are only spines; the hind margin carries some spines. The dactylus 

 is smooth, and about a sixth part as long as the metacarpus. 



The pleon is longer than the peraeon; the under margin of the segments is serrated, 

 and the hind corner is produced into a short spine-like process. 



The pleopoda. The outer ramus of the first pair has eighteen joints, the inner 

 sixteen. 



The urus is longer than the last pleonal segment; the first ural segment is only a 

 little longer than the last coalesced, which is a little broader than long. 



The uropoda. The first pair do not attain the apex of the second pair, and reach 

 a trifle beyond the apex of the peduncle in the last pair; the peduncle is narrow, linear, 

 more than seven times as long as broad, and is considerably longer than the inner ramus, 



