-Vs 1899. The Tys Fiord I. 



■/o 1899. Ofoten II. 



Bottom 72.") 111. 



At the two iilaces last iiKMitioned. however, the maximum 

 proved to be in the upper 100 meter.s, while their appearance in 

 the lower layers was very seldom. 



These observations tend to show that even in winter there is 

 no accumulation of C. fimnarchicioi in the greater depths in our 

 fiords (400 mtrs. and more). One is tempted to ask whether the 

 vertical movements previously mentioned are active or passive. It 

 may be replied that the vertical currents, which are caused by the 

 cooling- of the surface during- the winter, must necessarily influence 

 the movements of the plankton and have a share in their down- 

 ward course. If the movements of the animals arc active, these are 

 ill this case assisted by the current in the water. 



— It is not so easy to determine the spawning time for those 

 species in which the ovisack is wanting. But even here there are 

 interesting things to be noticed which have some connection with 

 spawning, as for instance the fastening of spermaphores to the 

 genital segment. 



I have only a time or two observed females of C. finmurrlticus 

 with .^pei'maphores aflixed. rrt. on ",•. 1809 Ofoten TI, •200—250 

 m. anil on ''/-j isii'.i Oxsund. o 15(i in. 



('(tl(l)ins lll/l)r)lioiri(s. KuilVEH. 



I have found single s]»ei'im('iis of this organism in tlie depths 

 of our fiords, and in the < )fot Fiord in tlie winter of 1K99 they 

 were sufticicntly numerous to deserve to be (Minsidered of importance 

 as food for plankton-eating fish. 



I will g-ive a series of observations made of the iminbers taken 

 at different depths with Dr. Pktkkskxs closing-net. whicii iiad an 

 openiuL:' whose surface measiire was about (i.u'.i m.-. 



'h 1899. Ofoten I. 



Number of 

 males. 



IJottoin (i;i(t 111. 

 Vz 1899. Tranodvbet. 



Bottom 040 111. 

 1899. The Tvs Fi( 



Bottom 72.5 m. 



