j^monsr the zooloffical collections of the last Swedish Arctic 

 expedition there is to be found the beautiful Isopod which 

 I am cfoing to describe in tliis paper. It belongs to the well 

 defined family of Aegidse, but difFers from the other genera 

 of that family in so important points, that it must be set 

 down as a separate genus. I propose Aegioclms as its generic 

 name and Nordenshiöldii as its specific name, in honour of 

 the celebrated chief of the expedition. It was captured some 

 few miles south of Cape Farewell, the south-eastern point of 

 Greenland, on the 31th of July 1883, where it was dredged up 

 from a stony bottom at a depth of 120 fathoms. Only a single 

 specimen was obtained. The following diagram will show 

 its place in the family of Aegidae. 





shorter than 

 the jjereion. 

 The segments 

 of the pe- 

 reion sub- • 



equal. 

 Tlie eyes. 



are large. The 

 second pair 

 of antennee 

 long, with a'^ 

 multi-articu 

 late flagel- 

 lum. Front 



ivithout a 

 fiattened 

 rostruvi. The 

 first joints of 

 the first pair 

 of antennae 

 distinct from 



above. 

 Body convex. 



with a fiat- 

 tened rost- 

 rum, concea- 

 ling the first 

 joints of the 

 first pair of 



antennae. 



Body more 



flattened. 



are small. The second pair 



of antennae short, with a 



few jointed flagellum. 



eqvalling the ijereion in length. The fifth 

 segment of the pereion longer and dee- 

 per than the preceding. 



1. Aega. Leach. 



2. Rocinela. Leåch. 



3. Alitropus. Milne 

 Edwards. 



4. Aegiochus n. g. 



