their walls, similarly to that recorded for plank- 

 ton nets of finer mesh (Tranter and Smith, 

 1968). 



Literature Cited 



Graham, J. J., and G. B. Vaughan. 



1966. A new depressor design. Limnol. Oceanogr. 

 11:130-135. 



Mahnken, C. V. W., AND J. W. Jossi. 



1967. Flume experiments on hydrodynamics of 

 plankton nets. J. Cons. 31:38-45. 



Tranter, D. J., and A. C. Heron. 



1967. Experiments on filtration in plankton nets. 

 Aust. J. Mar. Freshwater Res. 18:89-111. 



Tranter, D. J., and P. E. Smith. 



1968. Filtration performance. In D. J. Tranter 

 (editor) , Reviews on zooplankton sampling meth- 

 ods, p. 27-56. UNESCO Mongr. Oceanogr. Meth- 

 odol. 2 (Part 1). 



Joseph J. Graham 



National Marine Fisheries Service 

 Northeast Fisheries Center 

 Boothbay Laboratory 

 W. Boothbay Harbor, ME 0U575 



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