272 



lateral expansions of tin- -r^nH-iiK only slightly produced and obtuse at tin- ti|i: 

 last Moment rath.T small, scarcely lialf as long as tin- preceding one, and Inning 

 tin- anal operde considerably pruininciit . Caudal raini narrow linear in form and 

 slightly dherueiit. about equalling in length tin- last 2 segments combined, seta' 

 of outer edge small and attached near the end. dorsal seta well developed, middle 

 apical seta aliout twice the length of the ramus. Kye very collsj)icuous in the 

 living animal. Anterior anlenme res, -mbling in structure those in L. ft/jin-ns: :!rd 

 joint ho\ve\er comparatively longer. Posterior antenna' and oral parts almost 

 ictly as in that species. M pair of legs likewise of a very similar structure. 

 Natatory h'L-s differing in the presence of well-developed setse inside the outer 

 ramus. Last jiair of legs with the proximal part considerably longer than the 

 distal one, and tinelv ciliated on both edges, carrying inside at the end -l closely 

 juxtaposed seta 1 , distal part with 5 marginal seta-. '.\ at the tip and one on each 

 side. Ovisae rounded. 



Mul' with the anterior antenna 1 somewhat less strongly hinged than in 

 the preceding species. Inner ramus of 3rd pair of legs with the projection of the 

 middle joint very Mnall. Last pair of IC.LIS comparatively smaller than in female. 

 \\itli no boundary between the proximal and the distal parts; number of setae as 

 in the male of /,. t//jii<-ti*. 



Body of a beautiful violaceous colour, with the ova in the ovisac light green. 



Length of adult female 0.44 mm. 



/,' Hini-k*.-- This form, first described by Mr. A. Scott from a solitary 

 female specimen, is at once distinguished from the type species by the peculiar 

 -hape of the cephalic segment, and still more by the veiy prominent lateral pro- 

 cesses i->uin^ from its posterior part. It moreover differs conspicuously in the pre- 

 sence of \\ell-developed seta' inside the outer ramus of the natatory legs, and the 

 shape of the last pair of legs is also somewhat different. 



iii-fi nrt'.\ have met with this peculiar < 'opepod not inlYeipienth in 

 < ral localities both on the south and west coasts of Norway in depths raniim- 

 from In to :;n fathoms. It is houever easih overlooked on account of its 

 small sj/r. 



Distribution. I'.ritish Isles 



