Table of Determinations of Coefficients of Nets by Empirical Method. 



Plankton. 



Some silt. Synura and Copepoda. 



Much silt. Synura, Synchata, and Copepoda. 



Small amount of flocculent debris. Polymixic 

 plankton. Many nauphi. Entomostraca, Rhi- 

 zopoda, Rotifera, diatoms.and Protophyta present. 



Small amount of debris. Polymixic plankton. 

 Entomostraca, Rot ifera, Rhizopoda, Protoph yta. 



Polymixic plankton. Rotifera, Entomostraca, 

 Protozoa, and Protophyta. 



Entomostraca somewhat more abundant than in 

 the preceding test. Plankton polymixic. 



Much silt and debris. Polymixic plankton. En- 

 mostraca, Synchata, Protophyta. 



Very little debris. Polymixic plankton. Rotifera, 

 especially Synchata, Protozoa, Entomostraca, 

 Protophyta, and diatoms. Largely small forms. 



Monotonic plankton. Principally Synchata, a 

 few Synura, nauplii, Brachionus, and Codonella. 



Small amount of flocculent debris. Polymixic 

 plankton. Leptodora, Cyclops, nauplii, Difflugia, 

 and Flagellata. 



