KONGL. SV. VET. AKADEMIKNS HANDLINGAR. BAND. 22. N:0 7. 91 



The secoiid pair of antennen (fig. 3), in the feraale, ave somewhat shorter th;in the 

 first pair. The third joint is as long as the first and second, the fourth is fully as lung- 

 as all the three preceding joints together, narrow, styliforra, smooth. 



The first pair of 2)era'opoda (fig. 8 and 9). The fem ur is elongate-ovate, almost 

 as long as all the following joints together. The genu is short; the tibia has the hinder, 

 lower corner produced into a process reaching fully to the base of the carpal process, 

 armed at apex with five to six bristles. The carpus is triangulär, with the front margin 

 curved, the carpal process is stout and broad, longer than the rest of the carpus, its front 

 margin is longer than the hind mai'gin of the metacarpus, and finely serrated. The meta- 

 carpus is not twice as long as broad at the base, the front margin is curved, smooth, 

 the lower corner not produced, the hind margin is finely serrated. The dactylus is 

 stout, curved, serrated on the hind margin; it is shorter than half the metacarpus. 



The second pair (fig. 10) are somewhat longer than the first pair. The femur is 

 almost longer than all the following joints together. Tlie process of the tibia does not 

 reach fully to the base of the carpal process. The following joints are similar to those 

 of the first pair. 



The third and fourth pairs (fig. 1 1) are much longer than the two preceding pairs. 

 The femur is narrow; the genu is short, narrower than the femur; the tibia is twice 

 as long as the genu and much broader. The carpus is dilated, elongate-ovate, the hind 

 margin strongly curved, fringed with bristles. The metacarpus is narrow, linear, about 

 as long as the carpus, the hind margin densely fringed with very short bristles. The 

 dactylus is long, only a little shorter than half the metacarpus. 



The fifth, sixth and seventh pairs (fig. 12) are very elongate, flat and thin; they 

 are considerably longer than the third and fourth pairs. The femur is narrow, elong- 

 ate; the genu is very short, the tibia is more than twice as long as the genu, armed 

 at the hinder lower corner with a spine-like bristle. The carpus is longer than the two 

 preceding joints together, linear, the front margin armed with about ten short bristles. 

 The metacarpus is narrower and much longer than the carpus, and also considerably 

 longer than the femur, the front margin is fringed with very short bristles. The dactylus 

 is shorter than a third of the length of the metacarpus. 



The uropoda are elongate. The outer ramus of the first pair is scarcely longer 

 than half the inner; the rami of the second pair are almost equal in length. The third 

 pair are much longer than the second pair; the peduncle is more than three times as 

 long as the inner ramus; the outer ramus is longer than the inner one. 



The telson is triangulär, longer than broad, equalling a third of the length of the 

 peduncle of the last pair of uropoda. 



In order to prove the specific difference between Hyperoche Kroeyeri and H. 

 Luetkeni I quote here below some of their characteristics arranged parallely, adding for 

 comparison some of the characteristics of H. ahyssnrum. 



