Plankton let used tiy Dr. Schmitt 
in Antarctic, 1963 
'The ring has an inner diamieter of 19 inches, varying slightly, 
since it is not an accurate circle. It is attached to a forward 
net 32 inches long with l/4-inch mesh, somewliat constricted in 
in middle portion. The posterior part of the net is conical, 60 
inches long, \vith a mesh size of 0.4-0. 5 mm, apparently ho, 1 
"bolting silk (or nylon?) vmich has a mesh size of (B.417 
(Sverdrup, Johnson, & Pleining, Table 59) • 
