20 



ASTRID CLEVE-EULER, QUANTITATIVE PLANKTON RESEARCHES IN THE SKAGER RAK. 



Table 23. S. Skag 8. 58° 10' N., 9° 18' E. 8. XL 1912. 



Depth 



Tempera- 

 ture ° C. 



o 

 o 

 o 



>, 



'5 



"3 

 m 



O* 



>> 



CO 



c 



Q 



CO 



II 



® a. 



si 



3 03 

 '■SA 



sa a 



u. CD 



as o 



Q 3 



Ceratium 

 furca 



Ceratium 



fusus 



Ceratium 

 longipes 



Ceratium 

 lineatum 



10 



£ S 



.2 g 

 "S ° 



C3 t. 

 fe ° 



° S 



Ceratium 

 tripos 



Ceratia total 

 numbers 



Peridiniales 



total 



numbers 







7,01 



29,99 



23,51 



440 



10 



40 



30 



50 



130 





1,030 



1,290 i 1,670 



10 



7,45 



30,59 



23,92 



530 



10 



80 



120 



10 





30 



60 



330 i 960 



20 



8,85 



31,40 



24,36 



60 



















230 



30 



9,07 



34,11 



26,43 



00 









10 



10 





10 



30 



220 



40 



7,95 



34,74 



27,11 



20 



















110 



50 



7,69 



34,83 



27,21 





















140 



60 



7,65 



34,87 



27,25 



















110 



80 



7,57 



34,96 



27,32 











10 









10 90 



100 



7,12 



35,05 



27,46 



10 









10 









10 250 



150 



6,84 



35,05 



27,51 



(10) 



















30 



200 



5,96 



34,99 



27,57 



(10) 



















40 



300 



5,97 



35,03 



27,60 



















1 



20 



Among the Peridiniales, we notice a rather high maximum for Ceratia in the m. 

 layer, for a quite preponderate part formed by C. tripos. As a glance at the tables be- 

 neath for S. Skag. 9. will show a still greater maximum for this species, we may assume 

 a »flowering» going still on out from the coast. 



Table 24. S. Skag. 9. 58° 21' N., 8° 56' E. 8. XI. 1912. 



+2 



a, 



CD 



Q 



CDO 



£ OJ 



Z l- 

 CD 3 



o 

 o 



>, 



43 



'S 



(K 



C 

 P 



a ca 

 c3 d 

 03 ~ 



Thalassiosira 

 Norden- 

 skiöldii 



Coscinodis- 

 cus radiatus 



Guinardia 

 flaccida 



Rhizosolenia 



alata f. 



gracillima 



Rhizosolenia 

 fragilissima 



Rhizosolenia 

 semispina 



Thalassio- 



thrix Nitz- 



schioides 



Biddulphia 

 sinensis 



Diatoms 



total 

 numbers 







6,92 



27,21 



21 34 





50 



100 



130 



40 



270 



60 



450 





1,335 



10 



7,30 



27,79 



21,75 





10 





410 



30 



790 





720 





2,345 



20 



9,61 



32,32 



24,96 



30 





10 





5 







170 





305 



30 



9,99 



33,33 



25,67 













30 





40 





110 



40 



9,74 



33,58 



25,92 



80 





(10) 











20 





130 



(+10) 



50 



9,75 



33,77 



26,06 



400 





40 











70 





550 



60 



9,13 



34,18 



26,49 



110 















20 





220 



80 



7,87 



34,78 



27,13 



60 



10 

















160 



100 



7,63 



34,88 



27,29 



760 





10 















850 



150 



7,13 



34,99 



27,42 



380 



20 













10 



15 



480. 



200 



7,08 



35,01 



27,44 



420 

















10 



540, 



It is thus in the northern part of the basin, that we find the Ceratia at their maxi- 

 mum in the surface-water in late autumn, the development being here retarded in com- 

 parison with other parts of the route, where that genus is already going on scattering. 



To sum up the most important f eatures of the November-series, we may f irst point 

 out the very uniform nature of the sea-water, that is about 7 — 9° warm and relatively 



