598 



Occurrence. I have only seen a few male specimens of this form, 

 which were collected in two widely distant localities, viz., in the Trondhjems- 

 Ijni-d and at Hammerfest. In. both localities it was taken from a very con- 

 siderable depth, amounting to 150 fathoms. 



Gen. G- Janassa, Boeek, 1870. 



Syn: Jassa, Brnzelius (not Leach). 



Body comparatively robust and somewhat depressed, with the coxal 

 plates not very large, but of same appearance in the two sexes. Cephalon 

 with the lateral lobes very small and narrow, being defined posteriorly by a 

 deep and broad emargination. Eyes small, placed within the lateral lobes of 

 the cephalon. Antennse very strongly built, especially the inferior ones, 

 and densely clothed with stiff bristles, partly arranged in brush-like wreathes 

 projecting beyond the anterior edge, flagella in both pairs only composed of 

 a vcr}^ restricted number of articulations, the 1st of which is very large; 

 accessory appendage of the superior ones nearly obsolete. Mandibular palps 

 very strong, with the terminal joint spatulate and densely hirsute. Oral 

 parts scarcely differing otherwise from those in the genus Podocerns Gnatho- 

 poda in both sexes very unequally developed, the posterior ones being much 

 the stronger, with the propodos very broad, palm deeply excavated, and defined 

 in female by a projecting corner, in male by a narrow thumb-like process. 

 IVrciopoda about as in Podorfnis. Last pair of uropoda with the rami short 

 and subequal in length, the inner one distinctly hooked, but without secondary 

 denticles. Telson of moderate size, and sub triangular in form. 



I !<)))(! rl'x. This genus was first distinguished from Podocerns by 



I'.i a/.elius, but the generic name Jassa, which he applied to that genus, cannot 

 properly be accepted, since it is merely a synonym of Podocerus, being assigned 

 by Leach to species undoubtedly belonging to the latter genus. Boeck, for 

 this reason, changed the name Jassa to Janassa, though he erroneously identi- 

 fied the type of the genus with Podocerus r<tri<><tatus of Leach. The genus is 

 nearly allied to JWwv/f.x-, chiefly differing in the more strongly built and 

 densely hirsute antennae, the flagella of which are only composed of a very 

 restricted number of articulations, the accessory appendage of the superior 

 ones being <|uitc rudimentary. Only a single species of this genus has 

 hitherto been recorded. 



