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University of California Publications in Zoology [Vol. 15 



described on page 13. each length is proportional to the volume of 

 water which would have passed through the orifice of the net if 

 unobstmcted. 



Haul 3405 was repeated because the net was torn to pieces on the 

 first trial. Since both trials consumed the same amount of time and 

 the current meter registered during both, an idea of its accuracy may 

 be obtained; the length relative to the first trial was 127 and that 

 relative to the second 126 meters. 



