498 



strong, and in both sexes nearly equal-sized, those in female having the 

 propodos oval quadrangixlar in form, with the palm somewhat more oblique 

 in the anterior than in the posterior pair; those in male a little stronger, 

 with the propodos more oblong in form. The 3 posterior pairs of pereiopoda 

 comparatively short and stout, with the outer joints edged with fascicles of 

 small s])ines, basal joint of antepenultimate pair having the infero-posteal 

 corner obtuse-angular. Last pair of uropoda with the outer ramus well- 

 developed, and. coarsely spinous on both edges, inner ramus extremely small, 

 scarcely attaining Vs of the length of the outer, and narrow conical in form. 

 Telson comparatively small, each half with 2 lateral, and 3 apical spines. 

 Colour yellowish brown, with a pinkisli patch on each side, at the base of 

 the pleopoda. Length of adult female 15 mm. 



licmarliS. — The present species was first described by Leach under 

 the above name. It is quite certainly identical with the form subsequently 

 recorded by Rathke as G. poecihirus, and in all probabilit}^ also his G. Kraijcri 

 is the same species. Moreover the G. OlivH of M. Edwards must be adduced 

 as a synonym. It has, b}- most subsequent authors, except Sp. Bate, Boeck 

 and Dr. Hoek, been regarded as onh^ a variety of G. Jocnsta, from which 

 however, on a closer examination, it may be easih' distinguished by several 

 well-marked characteristics. For instance the lateral corners of the cephalon 

 are rather differently shaped, and the armature of the urosome is also rather 

 unlike. Moreover the eyes are much narrower, the gnathopoda differ less in 

 the 2 sexes, the pereiopoda are shorter and stouter, and finally the uropoda 

 are markedly distinguished by the poor development of the inner ramus. 



Occurrence. — The species is found along the whole south and west 

 coasts of Norway, and extends northwards at least to the Trondhjemsfjord, 

 according to Rathka even to tlie Namsenfjord^ It is a true littoral form, 

 being generally found above the usual tide marks, beneath detached moist 

 algae, in companj^ with Orchestia Jittorea and Hj/ale NiJssoni. 



Distrihiitioi). — British Isles (Sp. Bate), Bohu.slan (Bruzelius), Kattegat 

 (Copenhagen Museum), Dutch coast (Hoek). coast of France (Chevreux), 

 Mediterranean (Hellerj, Black Sea (Rathke). 



