KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 22. NtO 7. 257 



The telson is spade-shaped, as long as broad, and broader than the peduncle of the 

 last pair of uropoda. 



The female. 



The body is less distinctly carinated than in the male. 



The head is a little broader but not deeper than in the male. 



The first pair of antennce consist of a three-jointed peduncle and a very long single- 

 jointed flagellum, which is curved a little downwards. The first joint of the peduncle is more 

 than twice as long as the two following together. The flagellar joint is nearly three times 

 as long as the whole peduncle, thick at the base, and gently tapering towards the middle, 

 the rest is almost cylindrical, very slowly tapering towards the apex; the under con- 

 cave margin of the flagellum is coarsely serrated from the base to the middle, the 

 rest is smooth; on the inner side of the basal half of the joint there runs a feebly 

 elevated ridge, which is thickly set with long and slender olfactory hairs; these hairs are 

 usually geniculate near the apex. 



The second pair of antennae are longer than the first pair, and consist of a three- 

 jointed peduncle and a single-jointed flagellum; the first joint of the peduncle is very 

 short, the two following are longer and equal in length. The single flagellar joint is very 

 slender, almost needle-shaped, and is more than twice as long as the whole peduncle. 



The perceon is a little longer and wider than in the male. 



The ovitectrie.es are irregularly ovate, and considerably longer than the branchial sacks. 



The perceopoda are exactly like those in the male. 



The pleon is scarcely as long as the last five peraeonal segments together. 



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



K. Sv. Vet. Akad. Handl. Band. 22. N:o 1. &O 



