598 



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

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

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

 siderable depth, amounting to 150 fathoms. 



Gen. 6- JanaSSa, Boeck, 1S70. 



Syn: Jassa, Bruzeliii.s (not Leach). 



Body comparatively robust and somewhat depressed, with the coxal 

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

 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 

 tlie cephalon. Antennae very strongly l)uilt, especially the inferior ones, 

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

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

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

 accessory ajipendage 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 gemis Podocerus. Gnatho- 

 poda in both sexes very une(|ually developed, the posterior ones being much 

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

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

 Pereiopoda about as in Podocerus. Last pair of uropoda with the rami short 

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

 denticles. Telson of moderate size, and subtriangular in form. 



Ilemarlis. — This genus was first distinguished from Podocerus by 

 Bruzelius, but the generic name Jassa, which he applied to that genus, cannot 

 properly be accepted, since it is merely a sj'uonym of Podocerus, being assigned 

 by Leach to species undoubtedl}^ belonging to the latter genus. Boeck, for 

 tliis reason, changed the name Jas.^a to Janassa, though he erroneously identi- 

 fied the type of the genus with Podocerus rarieyatus of Leach. The genus is 

 nearly allied to Podocerns, chiefly differing in the more strongly built and 

 densely hirsute antennae, the flagella of wliich are only composed of a ver3^ 

 restricted number of articulations, the accessory appendage of the superior 

 ones being quite rudimentary. Only a single species of this genus has 

 liitherto been recorded. 



