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, Copejaoda and Polychaet 

 larvae, etc. x 25. 



