fil, Resumé. 
The investigations in the fjords of western Norway have proved 
that the plankton fauna in the depths of the fjords (200—400, 500, 
600 metres, etc.) is of an arctic character. In the deeplayers, where 
Atlantic conditions are prevailing (temp. 6—79 C., salinity 35 pro- 
mille, or a little more), copepods are living, which in the Aretie 
Qcean attain the biggest size and appear in the greatest multitude. 
Among the Crustacea from the Nansen Expedition, Mr. G. 0. Sars 
(17) has mentioned 28 species of copepods, and of these I have 
identified 12 species from the fjords of western Norway. 
Five species also occur farther south and can not be regarded 
as arctic copepods in a restricted sense of the word, viz: 
Calamus finmarchicus, GUNN., 
Pseudocalamus elongatus, BOrok, 
Acartia lomguremis, LILJEB., 
Oithoma similis, CraUs, 
Oneæa comiferd, GIESB., 
The other seven species are: 
Calanus hyperboreus, KRØYER, 
Spinocalanus longicornis, G. 0. SARs, 
Chiridius armatus, BOrck, 
FEuchæta norvegica, Borck, 
Scaphocalamus acrocephalus, G. 0. SArs, 
Metridia lomga, LUB»., 
Heterorhabdus morvegicus, BOEck. 
1 am of opinion that these copepods are endogenetie*") in the 
depths of our fjords, and are not brought to us by arctie currents 
1) See AvriviLLius (1, p. 18). 
