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



teeth on each side of the stem. The cleft bristle is stout, and the basal portion thickly 

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



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

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

 than long. 



The uropoda (PI. IX, fig. 30). The first pair do not reach fully 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 marrow, 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 pair 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 margin, and serrated 

 on the inner. 



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

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

 and not half as long as the same peduncle. 



