332 



margin, carpal expansion rather projecting. Posterior gnathopoda somewhat 

 more elongated, propodos oblong oval in form, with the palm scarcely longer 

 than the hind margin, carpal expansion much less projecting than in the an- 

 terior pair. The 4 anterior pairs of pereiopoda nearly as in H. mer/alopg. 

 Last pair about half the length of the body, basal joint obpyriform in out- 

 line, meral, carpal and propodal joints nearly of equal length. Last pair of 

 uropoda with the rami considerably longer than the basal part and very 

 narrow. Telson somewhat more elongated than in H. mc'(jah2)s, otherwise of 

 much the same appearance. Body jtelhicid, whitish, with a more or less distinct 

 yellowish tinge, but without any pigmentary ornamentation. Length of adult 

 female 6 mm. 



Remarks. — The present form, first described by Goes as an ffidiceros, 

 may be readily distinguished from the other species of the genus by its 

 comparatively short and stout body, but especially by the form of the 

 cephalon, the frontal part of which looks very like that of a typical Mono- 

 culodes; moreover the antennae are less unequal in length than in the other 

 species. 



Occurrence. ■ — I have met with this form in two places only off the 

 Finmark coast, viz., at Vadso and Hammerfest, in depths varying from 20 to 

 30 fathoms. Mr. Schneider has also found it in the neighbourhood of Tromso, 

 and Boeck moreover records it from Skraaven, Lofoten Isles. The statement 

 of the latter author as to its occurrence so far south as Bohuslan, seems 

 to me, on the other hand, to be rather questionable. 



Bistrihution. — Arctic Ocean: Iceland (Thorell), Greenland (Hansen), 

 Spitsbergen (Goes). 



Gen. 11. Bathymedon, G. 0. Sars, n. 



Syn. : Halimedon, Boeck (part). 



Form of body nearly as in the preceding genus. Cephalon with the 

 frontal part not at all prodiiced and forming only a small rostral projection 

 above the base of the superior antennee, lateral parts broadly rounded 

 off, and partly obtectiug at the sides the bases of the inferior antennte. Coxal 

 plates not very large, and but sparingly setous at the edges. Eyes wanting' 

 or imperfectly developed. Antennae now slender, now ratlier robust, and, as 

 a rule, not very unequal; those in male modified in the usual manner. Man- 



