KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 57. N:Q 7. 



37 



As the cold and dilute surface- waters of the preceding stations are here totally missing, 

 it is natural to find only little of their characteristic Sira-plankton, instead of which the 

 Pa ra /m-formation, registered already from the bottom of the Eastern Skager Rak (S. 

 Skag. 0) is ruling up to the surface, evidently flowing in by the Jutland Current at the 

 present station. Indeed, the uniform nature of the water as well as its plankton points 

 to a fresh import. Nevertheless, the scanty, but equally distributed Sira-flora lets us 

 conclude that also here a feeble intermixing with Baltic water may ha ve taken place. 



Table 55. S. Skag. 5. 57° 42' K, 9° 51' E. 25. II. 1914. 



o 



10 

 20 

 30 

 40 

 G4 





o 



rT 



?o 







Gi o 



>> 



>> 



-4J 



O, 



■*a 



si 



£ 



CO 



c 



CD 3 







H- 



cd 

 W 



Q 



03 

 '5 



-5 

 o 

 c 

 S 

 >> 

 o 



6,oo 



6,03 

 6,35 

 6,55 

 6,62 

 6,66 



34,72 



27,36 



34,76 



27,39 



34,85 



27,41 



34,92 



27,45 



34,92 



27,44 



34,9 



27,4 



120 

 160 



20 



80 



140 



CD 



20 



CO 



— CO 

 03 t- 



•3-s £ 



S 



3 



'c 



:-. 



CD 



O 



-O 



c3 

 *1 



Protozoa 



total 

 numbers 



-la 



Peridii 



toti 



nu ml 



•o 



o 



CO 

 CD 



3 



Bio 



multi 

 nosi 



360 

 500 







60 



800 







60 



200 



480 







80 



180 



120 







40 



240 



100 







120 



80 



160 







100 





Scanty in diatoms, this southern winter-water is still much poorer in peridinians 

 and infusorians, no multiplying being yet discernible in the surface. 



Table 56. S. Skag. 6. 57° 56' N., 9° 40' E. 26. II. 1914. 



♦2 

 CU 



<D 



Q 



Tempera- 

 ture ° C. 



o 



O 

 O 



>> 



'c 

 =3 



Vi 



>> 



43 



3 



a 



* 



Thalassiosira 

 Norden- 

 skiöldii 



Thalassiosira 

 fallax 



Lauderia 

 borealis 



Coscinodis- 



cus con- 



cinnus 



03 



1 s 



C 3 



4^ C3 

 CD -g 



<D O 

 O O 



Paralia 

 sulcata 



Guinardia 

 flaccida 



CD 



.S o 



O T3 



+3 



C co 

 <D 3 



ti 2 



u ." 

 "o C 

 co .2 



SS 



-— CD 



Chaetoceras 

 contortum 



.3 

 ■9, d 



"3 '3 



.2 



IH co 

 Ccö 



S-a 



n 



Thalassio- 

 thrix nitz- 

 schioides 



Diatoms 



total 

 numbers 







4,51 



33,42 



26,51 







100 





3,240 



2,900 







10 



260 



260 





700 



7,940 



20 



5,60 



33,84 



26,71 



20 





20 





400 



820 



80 





20 





200 





60 



2,060 



40 



5,69 



34,29 



27,05 



20 





240 





2,040 



2,520 







20 



40 



220 





420 



6,830 



60 



5,83 



34,58 



27,28 



80 









80 



700 



40 





40 



240 



20 





20 



1,700 



100 



6,94 



35,0i 



27,46 



10 





(10) 







200 















20 



260 



The plankton is very similar to that of S. Skag. 5 in the upper half of the column: 

 deeper down it gets quite poor. — Also peridinians and Protozoa do not show any new 

 features, except the Ceratia being a little less rare, cfr the table 57. 



Passing över to the deep Norwegian part of the Skager Rak, we are struck by the 

 almost complete lack of plankton at S. Skag. 8 and its still great scantiness close to the 

 coast (S. Skag. 9). This result was also confirmed by tow-nettings, made at the same 

 time. It stånds in a marked opposition to the observations of Mr Gran in 1912, who 

 stated a very rich Sira-plankton to be ruling in the 10 — 20 uppermost metres, that is 



