462 Birge — Vertical Distribution of Pelagic Crustacea. 



STATISTICS OP CYCLOPS. 



Table K — The average catch and the percentile distribution of Cyclops 

 by day and night, for the month. 



Depth. 



Average. 



Day. 



1 



i 



Night. 



Meters. 



No. 



Per cent. 



No. 



Per cent. 



No. 



Per cent. 



0—3 



863 



612 

 329 

 176 



28 

 2 



42.96 



' 30.44 



16.35 



8.77 



1.38 



.10 



997 

 686 

 336 

 181 

 26 

 2 



44.75 



30.81 



15.08 



8.11 



1.17 



.08 



682 

 517 

 319 

 171 

 30 

 2 



39.64 



3—6 



6—9 



9-12 



12-15 



30.05 



18.55 



9.92 



1.74 



15—18 



.13 



Total 



2010 





2228 



* 



1721 











The facts of this table are represented in PI. X, fig. 2. 



Table L — Average, and day and night distribution by Periods. 



Pebiod I.— July 7-14. 



Depth . 



Average. 



Day. 



Night . 



Meters. 



No. 



Per cent. 



No. 



Per cent. 



36.24 



27.68 



24.42 



9.33 



1.56 



.77 



No. 



236 



130 



111 



85 



50 



1 



Per cent. 



0—3 



234 



154 



137 



71 



28 



2 



37.38 

 24.60 

 21.88 

 11.34 

 4.47 

 .32 



233 



178 



157 



60 



10 



5 



38.50 



.3-6 



21.21 



6-9 



9—12 



12—15 



18.11 



13.87 



8.15 



15—18 



.16 



Total 



626 





643 





613 











