443 



of the 3 posterior pairs considerably expanded, and having tlie hind edge 

 distinctly serrated, that of last pair much the largest, and oval in form. 

 Last pair of iiropoda reaching but slightly beyond the others, inner ramus 

 somewhat larger than the outer, and having the outer edge bulging out at 

 the base. Telson oblong oval in form, not fully twice as long as it is broad 

 at the base, tip transversely truncated, and divided into a number of irregular, 

 partly bidentate serrations, having between them small bristles. Colour, 

 according to the statement of Mr. Schneider, sometimes very gorgeous, the 

 body being mottled all over with a magnificent carmine red. Length of 

 adult female attaining 14 mm. 



RemarJcs. — This form was first described by Bruzelius as a species 

 of his genus Paramphithoe , and was subsequently referred by Boeck to the 

 genus Halirages. It is, however, undoubtedly congeneric with the 2 above 

 described species, and ought therefore to be placed within Walker's genus 

 Aplicrnsa. From the said species it is easily distinguishable by the presence of 

 3 well-defined dorsal projections, and by the last 2 strongly serrated pairs 

 of epimeral plates of metasome, as also by the shape of the telson. 



Ocurrence. — I have myself only met with a few specimens of this 

 form, which were collected, many years ago, oft' the Finmark coast in com- 

 paratively shallow water among algae. According to the statement of Mr. 

 Schneider, it occurs in some places pretty plentiful!}'', thus in the Kvsenangen- 

 fjord, where numerous specimens were collected among the red algae, 

 especially DeJesseria, and it has also been observed by the same author at 

 Varde, east Finmark. The specimens examined by Bruzelius were likewise 

 from Finmark, and that from which Boeck made his description was collected 

 at the Lofoten Isles, the southernmost locality, where it has as yet been 

 observed. Out of Norway it has not been recorded; for Boeck's statement 

 about its occurrence oft" the coast of Bohnsliin, must certainly arise from 

 some error. 



G. Apherusa megalops, (i. 0. Sars. 



(PI. 156, lig. 2). 

 Halirages megalops, G. O. Sars, Oversigt af Norges Crustaceer, I, p. 102, PI. 5, (ig. 4. 



Body comparatively more slender than in the last species, and having 

 only the 2 anterior segments of metasome produced dorsally. Cephalon rather 

 large, considerably exceeding in length the first 2 segments of mesosome 

 combined, rostral projection extremely small, lateral corners sliort and broad, 



