VEG A-EXPEDITIONENS VETENSKAPLIGA ARBETEN. 010 
Conclusions. 
From the above enumeration it results that 
1:o) the genus Futhemisto (and possibly also Hyperia) is common 
to both the arctic and the antarctic regions; as it has only 
few representatives in the Northern and Southern temperate 
regions and none in the tropical, its centra of develop- 
ment are most likely to be searched for in both the frigid 
zones; 
2:0) the genus Lamceola 1s a true arctic form with only a few 
emigrants in the Northern temperate region; 
3:0) the genera Hyperia and Parathemisto are cosmopolites, prob- 
ably to be found in all the seas; 
4:0) the genus Cyllopus is a true antarctic form with its centre 
in the American Antarctic Ocean; 
53:o0) the genus Hyperiella 18 a connecting link between Hyperia 
and Futhemisto, with same centre as Cyllopus; 
6:0) the genus Hyperoche is an arctic form with its centre in 
the European Arctic Ocean; 
17:0) the genera Vibilia, Thaumatops, Mimonectes and Tryphena 
are occasional immigrants into the arctic region from the 
tropical and temperate regions, probably to be found oc- 
casionally also in the antarctic region (except Mimonectes); 
3:0) the genera Anchylomera and Thamyris are occasional immi- 
Srants intorthe antaretie reson, not likely to be found in 
täe” arcene. fealm. 
