

Chaeto-j)lan[4on: \\ Desmoj^lankTon- //>5tYli-f)lankton :^^ Sira-plan kton-. 

 )A Tncho-fDlankton: ^Tri pos-fDiankTon. 



Fig. 28. Distribution of the chief plankton types in the North Atlantic daring the summer. 

 (From Cleve, ^* Phyto-platikton of the Atlantic arid its Tributaries.") 



