PLATE XVII. 



[Photo by Edwin Thompson. 



Fig. 1. — Set of Plankton Nets, drying after use on the yacht. 

 Agassiz trawl hanging from the derrick forward. 



[Photo-micrograph by A. ScoTT. 



Fig. 2. — Mixed Plankton, containing Diatoms, Copepoda and Polychaet 



larvae, etc. X 25. 



