KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 35. K:0 7. 11 



nity, it will be found that inost species occur in all kinds of water. Still, I have tried 

 to make out whether some species eould not be considered as occuring chiefly in the one 

 or other kind. The result Avas the following: 



The 35 p. 111. water contained exclusively or prevalently the following forms: 



Isias clavipes (doubtless neritic), 

 Podon Leuckartii (doubtless neritic). 



These species are to be considered as occasional intruders in a kind of Avater, to 

 which they do not belong properly. 

 The 34 p. m. ivafer: 



Acartia longiremis (boreal, neritic), 

 Labidocera Wollastoni (meridional, neritic), 

 Codonella ventricosa (neritic, meridional and boreal), 

 Ceratium longipes (boreal), 

 Dinophysis Vanliöffeni (boreal, arctic), 

 Gonyaulax spinifera (boreal), 

 Peridinium ovatum (arctic and boreal), 

 Peridinium palliduni (arctic and boreal), 

 Rhizosolenia Stolterfothii (meridional, neritic). 



The forms derive thus in part from the north and in part from the south. 



Water of 32,49 to 33,95 p. m. salinity contained as most characteristic the follo- 

 wing forms. 



Temorn longicornis (boreal, neritic), 



Sagitta liipunctata (meridional), 



Amphorella subulata (neritic, meridional and boreal), . i '■.. V 



Noc.tiluca miliaris (meridional, neritic), ; .• . - .. . ■ 



Ceratium bucephalam (meridional), 



Peridinium globulus (meridional, oceanic), 



P. oceanicum (meridional, oceanic), 



Guinardia jiaccida (meridional, neritic), 



Leptocylindrus danicus (meridional, boreal, neritic), 



Rhizosolenia calcar ovis (meridional), 



R. Shrubsolei (meridional), , , 



R. styliformis (meridional, oceanic). , 



Most species characteristic for this kind of bank-water are thus of southern, in part 

 of oceanic, origin. This indicates that they have been swept from the southern Conti- 

 nental coasts by a flow of Atlantic water containing styli-plankton. As the characteristic 

 Atlantic species Rhizosolenia styliformis occurred abundantly along the dutch coast and 

 from there sparingly to the Limfjord, it is evident, that water with styli-plankton had 

 been driven through the Euglish Channel. 



