94 



about twice as deep as the body; 1st pair tapering inferiorly, tip narrowly 

 rounded; 4th pair witli the posterior expansion shorter and broader than 

 in H. cicada and obliquely truncated at the tip; 5th pair rounded, quadran- 

 gular and about as deep as broad. Last pair of epimeral plates of metasome 

 produced at the lateral corners to a sharp acuminated projection, posterior 

 edge slightly flexuous. First segment of urosome distinctly depressed at the 

 base dorsally. Eyes pronounced sigmoid in form, upper part very narrow, 

 lower rather expanded and forming nearly a right angle with the former, pig- 

 ment bright red. Superior antennae in female rather slender, about the length 

 of the cephalon and the 3 first segments of mesosome combined; flagellum 

 more than twice the length of the peduncle and composed of about 20 arti- 

 culations, the 1st of which is rather large, about equal in length to the 4 

 succeeding ones combined; accessory appendage scarcely attaining one third of the 

 length of the flagellum and G-articulate. Inferior antennae but little longer 

 than the superior, flagellum composed of about 24 articulations. Epistome 

 somewhat more projecting than in the type species, but broadly rounded in 

 front. Anterior gnathopoda with the propodos a little longer than the carpus, 

 palmar edge slightly flexuous and defined below by an obtuse angle. Posterior 

 gnathopoda with the propodos rather short, oval, scarcely half the length of 

 the carpus, dactylus small. Pereiopoda about as in H. cicada. Last pair of 

 uropoda with the inner ramus distinctly longer than the basal joint of the 

 outer. Telson rather narrow, about twice as long as broad, and having only 

 a single pair of dorsal denticles. Body pellucid, with a faint tinge of pale 

 reddish yellow. Length of adult female 14 mm. 



J!( j Hirks. Though at the first sight very like H. cicada, this species 

 may on closer examination be readily distinguished by the somewhat different 

 form of the cephalon, of the 4th pair of coxal plates and of the last pair of 

 epimeral plates of the metasome. Moreover the superior antenna? are compa- 

 ratively rather more slender and especially distinguished by the considerably 

 larger size of the 1st joint of the flagellum. 



Occurrence This species is not nearly so frequently met with as 

 the preceding one. Yet it would seem to occur along the whole West coast 

 of Norway, at least up to the Trondhjemsfjord, in depths varying from 50 to 

 150 fathoms. On the Norwegian North Atlantic Expedition it was collected 

 rather plentifully in the outer part of the Sognefjord at Stat. 8. It was, 

 lio\v<-ver, at that time confounded with H. cicada. 



