KONGL. SV. VET. AKADEMIENS HANDLINGAR. 13ANU. 22. N:0 7. 203 



The perceon. The iirst seguient is unusually loug, intich longer thaii the three 

 following sc3gineiits together, and about four times as loiig on the dorsal side as oii tlie 

 ve II trål. 



The first pair of perceopoda. The carpus is very little dilated, witli a verj' sliort 

 carpal process; the front side of the carpal process is soinewhat shorter than a third part 

 of the hind margin of the nietacarpus, and is armed at the apex with two slender bristles. 

 The metacarpus is almost conical, with bulging sides, tvvice as lorig as it is broad at 

 the base, and serrated along the hind margin, with simple teeth; on the lower halfofthe 

 front margin it carries two stout bristles. 



The second -pair reach fnlly to the apex of the carpus of the third pair. The 

 carpus is scarcely more dilated than that in the first pair; the carpal process runs 

 almost in a straight line with the stem of the joint, and has the front side not fully half 

 as long as the hind margin of the nietacarpus. The metacarpus is more slender than 

 that in the first pair, longer than the stem of the carpus, and serrated as in the first pair. 



The third and fourth pairs. The fem ur is scarcely longer than the three follow- 

 ing joints together. The carpus is nearly twice as long as the tibia; the hind margins 

 of both joints are serrated, and provided with one or two bristles. The metacarpus is 

 scarcely longer than the carpus, and has the hind margin finely serrated. The dactylus 

 is very long, about as long as three fourths of the metacarpus. 



The fifth, sixth and seventh pairs are about a fifth part longer than the third and 

 fourth. The fem ur of the fifth pair is narrower than that in the seventh, serrated along 

 the front margin, and considerably shorter than the three following joints together; that 

 of the sixth pair is fully as long as the three following joints, that of the seventh much 

 longer, the front margin being serrated and armed with four or five equidistant bristles. 

 The carpus of the fifth and sixth pairs is longer than the tibia, that of the seventh pair 

 is about half as long as the tibia. The nietacarpus is longer than that in the third 

 and fourth pairs. The front margins of the tibia, carpus and metacarpus are finely 

 serrated. The dactylus is slender, not fully half as long as the metacarpus. 



The pleon is only a little shorter than the head and pera3on together. 



The urus is shorter than the last pleonal segment; the first ural segment is much 

 longer than the last coalesced, which is about twice as broad as long. 



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

 peduncle is more than three times as long as broad, and considerably longer than the 

 inner ramus, which is longer than the outer; the outer ramus shows three notches on the 

 outer margin, the iimer margin is serrated. The peduncle of the second pair is more than 

 twice as long as broad, and quite as long as the inner ramus; the outer ramus is a little 

 shorter than the inner, with the inner margin serrated and the outer provided with two 

 notches. The peduncle of the third pair is fully twice as long as broad, with curved 

 margins, and almost twice as long as the inner ramus; the outer ramus is fully as long 

 as the inner, having the inner margin serrated and the outer twice notched. 



