KONGL. SV. VET. AKADEMIENS HANDLINGAT!. BAND. 22. N:0 7. .377 



The jirst pair of peroeopocla (Pl. XVI, fig. 22 and 23) reach far beyond the lower 

 end of the head. The fe in ur is almost as long as the fonr following joints too-ether. 

 The carpal process is more than half as long as the mctacarpus. The dact\ioptera 

 are broadly triangulär, and are onl}' a little shorter than the dactylus. 



The second pair do not fully reach to the middle of the carpus in the third pair. 

 The carpal process is quite half as long as the metacarpus. 



The tltird and fourth pairs are similar in shape and equal in longth. The carpns 

 is only a little longer than the two preceding joints together, and is quite as long as the 

 metacarpus; the hind margin is finely pectinated, and set with six or seven equidistant, 

 short hairs. 



The fifth pair (Pl. XVI, fig. 24) reach considerably beyond the npex of the fourth. 

 The fem ur is broader below, five times as long as it is broad at the apex, and is provided 

 with a sharp-pointed process above the lower hind corner; the femur is much shorter 

 than the tibia and the stem of the carpus together. The tibia is a little longer than the 

 genu, ovate, and much constricted at the base. The carpus is thick and swollen, -with 

 the stera about a third part longer than broad; the tubercle on the under margin of the 

 joint is distinctly two-pointed and feebly crenulated. The carpal process is short, not a 

 third part as long as the steni of the joint, and not twice as long as the two-pointed 

 tubercle; it is about a fourth part as long as the metacarpus. The metacarpus is 

 shorter than the stem of the carpus, and has a thick intumescence, set with hairs, on the 

 middle of the fi'ont margin. 



The sixth pair reach to the apex of the tibia of the fifth pair. The femur is almost 

 linear, somewhat inore than three times as long as broad. The genu is broader than 

 long, with the lower front corner squared. The metacarpus is not half as long as the 

 carpus. 



The seventh pair (Pl. XVI, fig. 25) are longer than the sixth. The femur is long 

 and narrow, ^\'ith the hind margin feebly convex and the lower front corner bluntly trun- 

 cated; it is about a third part longer than the femur in the sixth pair. The genu is broader 

 than long, with the lower front corner broadly rounded. The carpus is shorter than 

 the two preceding joints together. The metacarpus is only a little shorter than the carpus. 



The pleoti is onty a trifle longer than the last three personal segments together. 

 The lower hind corner of each segment is angular, but not produced into a sharp point. 



The xirus is longer than the last pleonal segment. The first ural segment is nearly 

 twice as long as the last coalesced, which is as broad as long. 



The uropoda (Pl. XVI, fig. 26). T\\& first pair do not reach to the apex of the last 

 pair. The peduncle is somewhat more than a third part longer than the inner ramus, 

 which is considerably longer than the outer. The second pair reach fully to the apex of 

 the peduncle in the third pair. The peduncle is not twice as long as the inner ramus; 

 the outer ramus is longer than the inner. The ped-uncle of the third pair is a third part 

 longer than the inner ramus; the rami are almost equal in length. 



The telson is semicircular, much broader than long, and is more than half as broad 

 as the hind part of the last ural segment. 



K. Sv. Vet. Akad. Haniil. Bftnfl. 22. N;o 7. 



48 



