145 

 1. Euryeope eornuta, G. 0. Sars. 



(PI. LXIV.) 



Ewycope eornuta, G. 0. Sars, Om en anomal Gruppe at' Isopoder. Chv. Vid. Selsk Fovhandl. 



1863, pag. 5. 



83-11 : Euryeope robusta, Harger. 



Specific Characters. Body oblong oval in outline, being more than twice 

 as long as it is broad, and with the anterior division not attaining half the length 

 of the posterior. Cephalon with the lateral corners pointed, front produced to 

 an acute, rostriform projection, which, however, does not extend to the end of 

 the basal joint of the superior antenna?. The 4 anterior segments of rnesosome 

 comparatively short, and produced on each side to acute, anteriorly-pointed lappets. 

 The 3 posterior segments of mesosome of nearly equal size, and distinctly denned, 

 antero -lateral corners acutely produced. Caudal segment very large, nearly as 

 long as the 2 preceding segments combined, semi-oval in form, edges evenly 

 curved and perfectly smooth, antero-lateral corners projecting. Superior antennae 

 in male fully half the length of the body, in female somewhat shorter, flagellum 

 very slender and flexible, being composed of 20 in female, in male of about 

 50 articulations carrying delicate sensory filaments. Inferior antenna? more than 

 3 times as long as the body, penultimate joint of the peduncle clothed everywhere 

 with adpressed spines, some of which, attached to the inner edge and tip, are 

 stronger than the others. Epignath of maxillipeds securiform, outer edge an- 

 gularly produced. 1st pair of legs with the propodos much shorter than the 

 carpus, both simple, linear, and clothed with short bristles, dactylus very small; 

 the succeeding pairs very slender, somewhat exceeding the body in length. Nata- 

 tory legs with the carpal joint cordiform, propodal one of about the same length, 

 but somewhat narrower, oblong oval, dactylus scarcely exceeding half the length 

 of the former. Female operculum subpentagonal in form, and distinctly carinated 

 along the middle; male operculum transformed in the usual manner. Uropoda 

 with the rami subequal in length, the outer one narrower than the inner. Colour 

 of the whole dorsal face, light reddish brown. Length of adult male 4 mm. 



Remarks. This is much the largest and finest of the Norwegian species, 

 and may be regarded as the type of the genus. It is, however, considerably sur- 

 passed by some of the exotic species, especially the huge arctic form E. giyantea 

 G. 0. Sars, which reaches to a length of 34 mm. The E. robusta of Harger is 

 unquestionably identical with the present species. 



Occurrence. This species occurs along the whole coast of Norway, from 

 the Christiania Fjord to Vadso, in depths ranging from 50 to 400 fathoms. In 

 some places, for instance in the Hardanger Fjord and Trondhjem Fjord, I have 



19 Crustacea. 



