13. V. 1914. Levander, Hydrobiologie der Bucht Tavastfjärd. 



255 



Monat 



Tag 



Temperatur in C° 



Salzgehalt in o/ 



00 



Juni 



12 17 25 



ca m 



lO lO 



Juli 



2 10 17 23 31 



o 



O 



05 



lO lo lO mm 



August 



5 14 25 



05 I CD 



lO lO I lO 



Vorticella sp. 



Rotatoria. 



Asplanchna brigtwelli 

 Synchaeta baltica . 

 « monopus 



Cathypna luna . . . 

 Anuraea aculeata 



« cochlearis . 



« eichwaldi . 

 Notholca acuminata 



Polychaeta. 



Trochophora .... 



Bryozoa. 



Cyphonautes . . . 



Copepoda. 



Acartia bifilosa . . . . 

 Eurytemora hirundoides 

 Cyclops leuckarti .... 

 Cop^porfa-larvae . . . . 



-juvenes 



Cladocera. 



Sida crystallina 



Daphnia cucullata 



Ceriodaphnia pulchella . . . 

 Bosmina obtusirostris v. ma- 

 ritima 



Ålona guttata 



« rectangula 



Podon polyphemoides . . . 



« intermedius 



Evadne nordmanni 



Mollusca. 



Tellina baltica: larvae 



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