KONGL. SV. VET. AKADEMIENS IIANDEINGAR. HAND. 22. N:u 7. 419 



The uropoda (Pl. XVII, lig. 20). The Ji.rst pair do not reacli fully to the ape.x 

 of the third pair; they are broadly ovate, broader below than above, and fringed with 

 uiinute hairs. The second pair do not attain the apex of the first pair, and are consi- 

 derably narrower; they are fringed with minute hairs as in the first pair. The third 

 pair are rather broader than the first pair, and are more than twice as long as the last 

 coalesced ural segment; the margins are fringed with minute hairs. 



The telson is broadly triangulär, with the margins soinewhat convex and the apex 

 rounded; it is broader than long, and about half as long as the last pair of uropoda. 



The f e m a 1 e. 



P]. XVII, fig. 3, 5, 19, and 21. 



The body is thicker and shorter than in the male. The liead and [)era!on together 

 are longer than the pleon and urus together. 



The head is comparatively deeper than in the male. 



The frst pair of antennce (Pl. XVII, fig. b) consist of a two-jointed peduncle and 

 a minute flagellar joint. The first joint of the peduncle is thick and swollen, the second 

 is very short, and a little broader than long. The single flagellar joint is rather shorter 

 and narrower than the last peduncular joint, and is covered with long stout olfactory hairs. 



The second pair of antennce. are represented by a slightly protruding tubercle below 

 the insertion of the first pair. 



The mO'uth-ori/a7is are like those in the male, but the mandibles want a palp. 



The perceon. The first and second coalesced segments are longer than the third; 

 the fifth segment is the longest of all. 



The ovitectricefi ai-e thin, irregularly ovate, and a little shorter than the cori-esponding 

 branchial vesicles. 



The percp.opoda are exactly like those in the male. 



The pleon is considerably shorter than the perajon. 



The urus and its appendages are like those oa'gans in the male. 



