47 



5-articulate. Inferior antennae (in female) rather slender, Hagellmn short, about 

 as long as the penultimate joint of the peduncle, ;nnl composed of ."> joints, 

 Anterior gnathopoda having the basal joint slightly dilated and shorter lliau 

 the remaining part of the leg, propodos scarcely as long as the carpus, 

 daetylus very small. Posterior gnathopoda very slender, propodos about hall' 

 the length of the carpus. Last pair of uropoda with the outer rannis nearly 

 twice as large as the inner, the latter lanceolate, unarmed. Telson oval, 

 gradually tapering, cleft beyond the middle, the incision very narrow. Colour 

 dark purplish red from numerous pigmentary spots arranged in transversal 

 bands across the segments and continued down the coxa I plates ami legs, 

 Length 13 mm. 



Remarks. Only female specimens have hitherto lieen observed. 



There is, however, every reason to believe that the male would diller from 

 the female in a manner quite analogous to that observed in the genera 

 Lysianassa and Socarnes. 



Occurrence. Although very rarely met with, this hcautit'iil Lvsia- 

 nassid would seem to occur along the whole coast af Norway. 1 have found 

 it in several places both on the south and west coast as far north as 

 Hammerfest in Finmark. It is found in depths varying from 40 to KM) 

 fathoms. Out of Norway it has not yet been recorded. 



Gen. 10. Aristias, Boeck, 1870. 



short and thick, with comparatively small coxa 1 plates. Superior 

 antenna? rather slender, peduncle narrower than usual. Inferior anienme in 

 female) shorter than the superior, with the antepenultimate joint of the 

 peduncle short and thick. Epistome scarcely projecting and denned from the 

 anterior lip by a small but distinct sinus. Posterior lip membranous. 

 short and blunt lateral corners. Mandibles strong, cutting edge ijiiilc -impl 

 molar expansion very narrow and prominent, acuminate at the lip, palp rather 

 elongated and attached at the same level as the latter. First pair i 

 with the masticatory lobe very broad and edged with numerous unequal 

 alternating spines, the basal lobe small and rounded, having f> thic 

 seta? on the inner edge; palp normal. Second pair of maxilla' with 

 widely diverging, the inner one very broad and sin .ugh 

 with numerous spiniform setse, the outer lobe much narro er and pointing 

 straight forwards. Maxillipeds comparatively small, masticatory lobe oval, palp 



