308 



distally. 1st joint nnicli the largest and very thick. 3rd joint shorter than 2nd, 

 terminal part about half the length of the proximal one. with its 1st joint very 

 -mall. Posterior antenna 1 \\ith the terminal joint shorter than the proximal one 

 and spatnlate in form, heing armed at the tip with 4 strong, claw-like spines: 

 outer ramns somewhat lamellar and carrying on the tip 4 subequal seta-. Mandibnlar 

 palp comparatively large, with 4 coarse plumose setae. Anterior maxillipeds with 

 the digitiform lobes rather short and thick. Posterior maxillipeds of moderate 

 si/.e. hand narrow oblong in form and den-el\ ciliated inside, dactylus armed at 

 the inner edge with a ro\\ of slender spinnles. Natatory legs coarsely spinulose, 

 with the seta' much reduced: spines of outer ramus however very coarse. Last 

 pair of legs with the distal joint well defined and short spatulate in form, car- 

 rying 5 marginal seta-. -1 of which are very thin, the other 3 strong and densely 

 plumose: proximal joint with a transverse ro\\ of 4 coarse spinules at the junction 

 with the distal joint, its inner expansion not at all produced, the hind edge being 

 almost straight and pro\ided with 4 coarse plumose setae. Ovisac of moderate 

 si/e. rounded oval in form. 



Colour reddish brown. 



Length of adult female 0.70 mm. 



/.V/^///,.s. The above-described form is undoubtedly identical with that 

 recorded by Lilljeborg as Ili/u/ih/it/* /li'.i'iliili*. This author considered it to 

 lie both specifically and generically different from Nun itn/>* jxilttstri* of Brady, 

 and I was at first of the same opinion myself. Seing liowever that Dr. ('ami, 

 in his work on the < 'opepoda of Houlonnais. has described the very same form 

 under the name of Xni/i/n/,/!.- /mltislri^ Brady, I have again carefully compared 

 the imperfect description and figures given in Brady's Monograph, and have 

 thereby been induced to believe that in all probability the identification of 

 the species by Dr. Canu will prove to be correct. The habitus-figure given by 

 Brady (dorsal view of the animal) has apparently been made from a mounted 

 specimen in which, by the pressure of the cover-glass, the form of the body has 

 been somewhat injured. The L' detail-ligures i.-i leg ol the 1st and 4th') pairs) 

 do not. on the other hand, exhibit any essential difference from the structure 

 found in the present form. 



Occurrence.- 1 ha\e onl\ met with this form in a single locality near 

 ( 'hristi.-niia. It occurred there occasionally in a shallow creek of the Fjord, on 

 .1 muddy bottom close to the shore. As observed b\ Prof. Lilljeborg, the 

 movements <,f the ;inimal are very slow, and it seems to be quite devoid of 



'i N..I tin- >\-'\ iniir. ni indicated \<\}\ in tlir t''\i .-mil in ilir explanation of tbe plate, 



