Table 3. --Variations in numerical abundance (numberj.' of organiBms per cubic meter 

 of water strained) of 12 major groups of the zooplankton aa sampled on 

 cruise 16 of the Hugh M. Smith . (S = surface sample, I = intermediate 

 sample, and D = deep sample) 



1/ A zero indicates no organisms present; a hyphen indicates a count of less than 

 1 per cubic meter. 



