4 AXEL OllLIX, ARCTIC CRUSTACEA. 



In this paper I give a list of F/ii/Uocar/da, Isopoäa, and 

 Cnmacca. As will be seen, these orders are rcpresented by 

 a ratlier great iiumber of species (1, 19, 10, resp.)- Some more 

 additions in particular of Tanaidce and minute Cnniareu will 

 probal)ly follow, when some glasses and jars with clay and 

 mud from the bottom ha ve been sifted. 



The geographical and biological moments affoid, in niy 

 opinion, mucli more tlian the systematical ones the greatest 

 interest in such ennmerations as this. Therefore. I have 

 mentioned the distribution as well the horizontal as the ver- 

 tical for every species as far as I could lind it in the litern - 

 ture. When I have worked iip the other orders of Malacos- 

 traca, I expect to give a summary of the results at which I 

 have arrived as to the distribution and the biolog}' of the 

 Arctic C^rustacea, especiall}' as compared with their antipodal 

 representatives, of which I ani, at the same time, studying 

 rather large eollections brought home by Dr. W. Michaelsen, 

 of Hamburg, in 1802—93 and by myself in 1895—96 from 

 Tierra del Fuego, Patagonia, and the Falkland islands. 



"With regard to systems, I have followed, for the most 

 part, that of Särs, which is now generally adopted by the 

 most eminent carcinologists. Thus, I place ApseudidcB and 

 Tanaidce as the lirst tribe of Isopoda, but, like Claus and 

 Hansen, i consider Xehalia more allied to the Malacostraca. 



The Crustacean fauna of East Greenland which was 

 formerly nearlj' unknown, as zoological eollections from that 

 coast only once had been obtained before (by the German 

 Expedition 1869—70 under the commando of Captain Karl 

 KoLDEWEY)^ has been highly enriched by Prof. Natuorst's 



The three orders to be described in this paper are represented in that collec- 

 tion only by one species. 



' T he ' tollections of the last Danish Expeditions both of the lugolf- 

 Expeditiou and of that under the commando of Lieuteuant Amdrop which is 

 to be continued even for next season 1900—1901, are not yet worked up: 

 they comprise the coast sonth of lat. 70° N., and they will probably fill 

 great gaps in onr knowledge of the fauna of these regions. At least, I know 

 that the Ingolf Expedition brought home an unsurpassed number of rare and 

 new crastaceans. the description of whicli Dr. Haxsex is going to undertake. 



Sincc this paper was communicated to the Academy, my attention was 

 callcd to a ]iaper of Hansen, in which he, in 1895, gives a short list of Fycno- 

 goniäa and Malacostraca from East Greenland. He enumerates the follow- 

 ing Isopoda and Cumocea: Sphyrapus anomaliis G. O. Särs, Calathiira 

 hraehiata (Stimp.son), Anceus elongatus KRriYEK, Arcturns Baffini (Sabinf;). 

 Arctiirvs hystrix G. O. Särs, Janira maculosa Leach. Mnnnopsis typicn 

 M. Särs. Phryxvs abdominalis (Kröyer). Gyge Hippolytes (Kköyer), Leucnn 

 nasicus (Kröyer). Diasfylis Edicardsii (.Kröykr). Diasiylis resima (Kfuiy-er). 



