253 



uropoda, by which the 2 genera may be easily distinguished, and for this reason 

 I have thought it right to retain the genus of Prof. Meinert, though I must allow 

 that it is far from being a well defined one. 



Occurrence. This form was taken during the Danish Expedition in 

 4 different places, 3 of which lie in the Skagerak, NE of the Skagen light-house, 

 the 4th in the Kattegat. It has not yet been found off the Norwegian coast; 

 but I regard it as very probable that, on a closer investigation, it will be found 

 to occur there, at least off the southern part of the country. 



Eugerda eoarctata (Hansen). 



(Suppl. PI. in, fig. 2, PI. IV, fig. 3). 

 Desmosoma coarctatum, Hansen, MS. 



Specific Charaters. Body of female not very slender, with the anterior 

 and posterior divisions of the body of about equal length. Cephalon rather 

 large, with the frontal edge evenly rounded. The 3 anterior segments of meso- 

 some of about same size and appearance, having the lateral parts curved anteriorly 

 and terminating in an obtuse point; 4th segment considerably broader in front 

 than behind and transversely truncated at the extremity; 5th segment rather 

 broad, irregularly quadrangular in shape, and very distinctly contracted in the 

 middle, anterior corners obtusely produced. Caudal segment oval in form, and 

 distinctly notched on each side of the obtusely rounded extremity, the notch being 

 defined in front by a tooth-like projection. 1st pair of legs very strongly built, 

 with the joints considerably dilated, meral joint with 2, carpal joint with 3 strong 

 spines inside, propodos oblong oval, finely denticulate inside; the 3 succeeding 

 pairs more slender, and successively decreasing in size, carpal joint with a restricted 

 number of spiniform bristles arranged in a double row, propodal one rather narrow, 

 dactylus comparatively strong. The 3 posterior pairs of legs, as in E. globiceps, 

 imperfectly natatory. Uropoda with the outer ramus very small, though well 

 defined. Male resembling in outward appearance the female, and, like the latter, 

 having the frontal part of the cephalon evenly rounded ; posterior section of meso- 

 some scarcely more fully developed than in the female, its 1st segment being 

 even somewhat narrower, with the anterior corners less produced. Length of 

 female 2 mm., of male iVs nim. 



Remarks. This species is easily distinguishable from the preceding one 

 by the fuller development of the 1st segment of the mesosome, and by the different 

 form of the 4th and 5th segments, as also by the distinct notches occurring at 



