KONGL. SV: VET. AKADEMIENS HANDLINGAR. BAND. 22. NIO 7. 407 



are about four times as long as broad, with both margins serrated, and the hind portion 

 more or less deeply emarginate. 



The telson is triangular, broader than long, more than half as long as the last ural 

 segment, and about a fourth part as long as the last pair of uropoda. 



The female. 



PL XVII, Pig. 24 and 25; pi. XVIII, fig. 1 and 2. 



The body is scarcely thicker and broader than in the male. The head and pera?on 

 together are quite as long as the pleon and urns together. 



The first, pair of antenna (PI. XVII, fig. 25) in the adult female are as long as 

 the head and the first two peraeonal segments together. The single peduncular joint is 

 as long as broad. The flagellum consists of a single joint, which is tolerably broad at 

 the base and tapers slowly towards the apex; it is about ten times as long as the ped- 

 uncle, and is sparingly set with olfactory hairs along the inner margin. In the young 

 female the single flagellar joint is thick, short and conical, and is scarcely twice as long 

 as the peduncle. 



The second pair are wanting, only represented by a small tubercle at the lowest 

 end of the front side of the head. 



The mouth-organs are like those in the male, but the mandibles want a palp. 



The percBon. The first segment is longer than the second; the seventh is furnished 

 with spine-like processes as in the male. 



The ovitectrices are very thin, broad,- and longer than the branchial vesicles. 



The perceopoda agree in every respect with those in the male. 



The pleon is a little longer than the whole pera?on; the segments are armed as in 

 the male. 



The urus is as long as the last pleonal segment; the first ural segment is fully as 

 long as the last coalesced, which is considerably broader than long. 



The u/ropoda are like those in the male. 



