335 



as also in the Troiidhjemsf)ord. It extends northwards to the Lofoten Isles, 

 hut would seem to he wholly absent oft' the coast of Finmark. Out of 

 Norway it has not yet been recorded. 



30. Bathymedon Saussurei (Boeck). 



(PI. 118, fig. 1). 

 Halimedon Saussurei, Boeck, Cnist. ampli. bor. & .irct. p, 90. 



In outward appearance very like the preceding species, though perhaps 

 somewhat more slender of form. Cephalon but little exceeding in length the 

 first 3 segments of mesosome combined, rostral projection somewhat more 

 produced than in B. lonfj/hririniis, reaching a little beyond the middle of the 

 basal joint of the supeiior antennae, lateral lobes not so deep as in that species 

 and nearly riglit-angled, their anterior edges perfectly straight. First pair 

 of coxal plates rather expanded in their outer part, distal edge arched; 4th 

 pair rather large and deeper than the corresponding segment, distal edge 

 strongly curved in the middle, infero-posteal corners nearly rectangular. 

 Eyes inconspicuous, and replaced by an irregular patch of whitish pigment, 

 which however does not extend into the anterior part of the mesosome. An- 

 tennae in female rather slender, the superior ones attaining the length of the 

 cephalon and the first 5 .segments of mesosome combined, 2nd joint of the 

 peduncle much longer than the 1st, flagellum attaining the length of the 

 peduncle, and composed of about 14 articulations. Inferior antennae scarcely 

 as long as the superior, the 2 last joints of the peduncle nearly equal-sized, 

 flagellum about the length of those joints combined. Anterior gnathopoda 

 with the propodos about the length of the carpus and oblong oval in form, 

 palm scarcely longer than the hind margin, carpal expansion somewhat pro- 

 duced anteriorly and narrowly rounded at the tip. Posterior gnathopoda 

 extremely slender and feeble in structure, propodos nearly linear in form 

 and exceeding in length the 3 preceding joints combined, palm short and 

 imperfectly defined, carpal expansion nearly obsolete. The 2 anterior pairs 

 of pereiopoda of the usual structure, propodal joint shorter than the 

 carpal one, and having at the tip a dense brush of bristles, dactyl us long 

 and slender. The 2 succeeding pairs very unequal in length, the 4th 

 pair being nearly twice as long as the 3rd, with the propodal joint very 

 slender and elongated, dactylus in both pairs comparatively much more elon- 

 gated than in B. Jomjinianiw^. Last pair of pereiopoda extremely slender, and 

 of quite an iinusual length, nearly equalling that of the whole body, basal 

 joint oval in form, carpal joint greatly elongated, about twice as long as the 

 meral one, and also somewhat longer than the propodal joint. Last pair of 



