47 



from above, nearly quadrate in form, with the side-contours somewhat flexuous. 

 2nd and 3rd segments of mesosome each with 2 small juxtaposed dorsal tuber- 

 cles close to the anterior edge; the 3 succeeding segments having, in the same 

 place, a very conspicuous oval depression; dorso-lateral keels, in these and the 

 preceding segments, very strongly marked. Eyes fairly conspicuous, though 

 rather small, each forming a slight bulging laterally, pigment opaque white, visual 

 elements imperfectly developed. Antenna.' resembling those in the preceding 

 species, though having the flagella more fully developed. The other appendages 

 of much the same structure as in C. norvegica. Colour uniformly greyish brown, 

 without any pigmentary ramifications. Length reaching to 29 mm. 



Remarks. — As stated above, I am of opinion that this form is speci- 

 fically distinct from the preceding one. The resemblance between the two, it 

 is true, is very close; but yet there are to be found some well-marked differences, 

 which do not allow of their being united in one and the same species. Not to 

 speak of the great difference in size, the present species is well distinguished, by 

 the presence of distinct, though rather imperfectly developed eyes, of which no 

 trace is to be found in the other species, and also by the peculiar dorsal mark- 

 ings so conspicuous in the form here under consideration, and scarcely at all 

 visible in C. norvegica. 



Occurrence. — The only place on the Norwegian coast, where I have met 

 with this form, is in the Varanger Fjord at Vadso. It here occurred occasionally 

 in a depth of about 120 fathoms. 



Distribution. — Atlantic coast of North America (Stimpson, Harger), Franz 

 Josef's Land (Heller), Greenland (Hansen), the Kara Sea (Hansen), Norwegian 

 North Atlantic Expedition in several Stations, as far north as Jan Mayen and 

 Spitsbergen (the present author), Porcupine Expedition in 6 different Stations, as 

 far South as the bay of Biscay (Norm. & Stebbing). 



Gen. 2. Leptantlmra, G. 0. Sars. n. 



Generic Characters. — Body in both sexes very slender and elongated, with 

 the metasome distinctly segmentated, and rather more fully developed in male 

 than in female. Eyes absent. Both pairs of antenna?, in female short and thick, 

 with the flagellum rudimentary, the superior ones in the male, however, rather 

 fully developed, with the flagellum large, multiarticulate, and densely clothed with 



