KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 22. N:0 7. 163 



teetli on each side of the stein. The cleft bristle is stout, and the basal portion Ihic^kly 

 fringed with long hairs. The rami consist of sixteen joints each. 



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

 is much longer than the last coalesced segment, which is a third part broader 

 than long. 



The uropoda (Pl. IX, fig. 30). The first pair do not reach fuUy to the apex of 

 the last pair; the peduncle is linear, three times as broad as long and half as long again 

 as the inner ramus; the rami are equal in length, narrowly lanceolate, and sharp- 

 pointed; the outer ramus is smooth on the outer margin, and finely serrated along the inner; 

 the inner ramus in finely serrated on the lower parts of both margins. The second pair 

 reach to the middle of the rami of the last pair; the peduncle is broader at the apex 

 than at the base, twice as long as broad at the apex, and only a little longer than the 

 inner ramus; the inner ramus is much longer than the outer one, and twice as broad, 

 ovate, with narroAv, sharp-pointed apex, and it is finely serrated on the lower parts 

 of both margins; the outer ramus is elongate, broadest at the base, serrated on the inner 

 margin, and smooth on the outer. The third p)air are the broadest; the peduncle 

 is twice as long as broad, but not twice as long as the inner ramus; the rami are 

 equal in length and longer than the breadth of the peduncle; the inner ramus is a third 

 part broader than the outer, heart-shaped, and serrated on the lower parts of both 

 margins; the outer ramus is almost lanceolate, smooth on the outer maxgin, and serrated 

 on the inner. 



The telson is scarcely longer than broad, spade-shaped, and much shorter than the 

 last ural segment; it is inuch narrower than the peduncle of the last pair of uropoda, 

 and not half as long as the same peduncle. 



