34 O. Nordgaard. | [No. 4 
There are consequently in the fjords of Bergen more forms of 
copepods that contribute to the nourishment of the plankton-eating 
fishes than in the northern fjords. It must, however, be remem- 
bered that the number of individuals may be greater in the northern 
fjords than in those of the west coast. 
ÅTURIVILLIUS, GRAN and myself have found that the annual 
maximum of Calanus finmarchicus oceurs later in the fjords than 
in the coast ocean. When it is considered that this copepod con- 
stitutes the main part of the food of the herring, it may seem rea- 
sonable to suppose that the migrations of the herring into the fjords 
are in some way connected with the above circumstance. 
I have found that some hydrographic changes (as the tempe- 
rature min. of the spring and the max. of the autumn) oceur some- 
what later in the fjords than in the coast ocean. But whether 
there be any relation of causality between this delay and the delay 
of the maximum oceurrence of Calanus finmarchiceus, I dare not say. 
Plankton-forms that have not before been noticed from Norway, 
are the following: : 
Hastigerina pelagica, D'Ora., 
Periphylla hyaeinthina, (FABER), STr., 
Scaphocalanus acrocephalus, G. Q. Sars, 
Spinocalanus lomgicormis, G. O. Sars, 
Thaumaleus germamieus, Timm. 
There is reason to believe that the two copepods Scaphocal. 
acroceph. and Spin. lony., are endogenetie in the depths of our 
fjords. 
Hastigerma pelagica and Thaumaleus germamieus are probably 
brought to our coast by southern currents. Ås for Thaumaleus, 
this is the more likely as this copepod spends the first part of 
its life as åa parasite in an annelid, Polydora giardi, Mzsn.,*) which 
has not been observed in our waters. 
1) See A. GIarD (60, p. 1). 
