- ij — 



and the terminal and proximal processes are quite wanting; 

 furthermore the median lobe has a well developed lateral 

 process and no additional process, but the lobe itself is 



Fig. 3. Nyctiphanes capensis n. sp. Left copulatory organ, 

 from behind, li. Inner lobe; Im. median lobe; Is. setife- 

 rous lobe; p 1 . spine-shaped process; p k . lateral process. 



short or very short, at most reaching the end of its process 

 and sometimes terminating at the base of the process. 



Only a single species, M. norvegica M. Sars, is known ; 

 Holt and Tattersall give a good representation PI. xvi). 

 Synonyms are: Thysanopoda nana M. Sars, Enphausia 

 intermedia Riggio and E. lanei Holt and Tatt. 



Nyctiphanes G. O. S. 



The only reliable specific characters in this genus are 

 afforded by the antennular peduncles of both sexes and the 

 male copulatory organs. In the male the antennulae have 

 second and third joint conspicuously thicker than in the 

 female, the adornment of both joints with processes or 

 setae differs in the two sexes, and the shape of third joint in 

 the male is somewhat peculiar, while the shape of the 

 upper distal leaflet from first joint is nearly identical in 

 both sexes. But as Illig in 1908 (//) established a new 



(210) 



