127 



and scarcely exceeding it in length. Cephalon rather large, with the frontal part 

 narrowly truncated. First segment of mesosome scarcely smaller than the suc- 

 ceeding ones, and produced on each side to an acute, anteriorly-pointing lappet ; 

 lateral parts of the 3 succeeding segments evenly rounded ; 5th segment with the 

 antero -lateral corners not produced. Caudal segment oblong oval in form, with 

 a distinct notch on each side near the tip. Superior antennoe 5-articulate. In- 

 ferior antenna? about half the length of the body, flagellum not attaining the 

 length of the 2 outer peduncular joints combined-, and composed of 8 articulations. 

 1st pair of legs very strongly built, carpus large and broad, with 4 slender spines 

 inside, propodos about the same length, but narrower, and oblong oval in form. The 

 3 succeeding pairs of legs narrower than in D. lineare, and less densely clothed 

 with spines ; the 3 posterior jtairs likewise considerably narrower than in the type 

 species, though otherwise of a very similar structure. Uropoda scarcely more 

 than half the length of the caudal segment, distal joint about 3 times as long 

 as the proximal one. Colour whitish, semi-pellucid. Length of adult female 

 scarcely 2 mm. 



Remarks. — The present sj>ecies, of which only female specimens have 

 hitherto corae under my notice, is easily distinguishable from D. lineare by the 

 less fully developed posterior section of the mesosome, the form of the 1st seg- 

 ment and of the caudal segment, and the very strongly built 1st pair of legs. 



Occurrence. — I have met with this form occasionally in 2 widely distant 

 localities of the Norwegian coast, viz., in the inner part of the Christiania Fjord 

 and at Aalesund, the depth ranging from 30 to 50 fathoms. Out of Norway, 

 it has not yet been recorded. 



Gen. 5. Eugerda, Meinert, 1890. 



Syn: Desmosoma, G. 0. Sars (part). 



Generic Characters. — Form of body much as in Desmosoma; 1st segment 

 of mesosome, however, very small, and not produced laterally in any of the sexes. 

 Antennee and oral parts of almost exactly the same structure as in the said genus. 

 1st pair of legs in both sexes very slender and feeble, with the outer joints ex- 

 tremely narrow, almost filiform ; the other legs of a similar structure to those in 

 Desmosoma. Uropoda distinctly biramous, outer ramus smaller than the inner. 



Remarks. — This genus was established in the year 1890 by Prof. Meinert, 

 to include a sirpposed new Isopod from Kattegat, which, however, has turned out 



