214 



University of California Publications in Zoology [Vol. 



Table 2. — Organisms Per Cubic Meter in Plankton op 

 San Joaquin River in 1913 — (Continued) 



1913 



9/ 6 

 9/13 

 9/20 

 9/27 

 10/ 4 

 10/11 

 10/18 

 10/26 

 11/ 1 

 11/ 8 

 11/15 

 11/22 

 11/30 

 12/ 6 

 12/14 

 12/20 

 12/27 



12,S00 



12,800 



12,800 

 12,800 



1,600 



3,200 

 9,600 



Difflugia 

 piriformis 



25,600 



52,896 

 3,200 

 1,600 

 1,600 



105,792 

 ■ 2,800 



105,792 



105,792 

 52,896 

 105,792 



317,376 

 211,584 



105792 

 846,336 

 105,792 

 211,584 

 211,584 

 52,896 



Total 

 Rhizopoda 



567,360 

 211,584 

 330,176 

 131,392 

 846,336 

 330,176 

 211,584 

 330,176 

 158,688 

 211,584 

 158,688 

 6,400 



1,600 

 3,200 

 3,200 

 11,200 



1913 



1/ 5 

 1/12 

 1/19 

 1/25 

 2/ 2 

 2/ 8 

 2/15 

 2/23 

 3/ 1 

 3/ 8 

 3/15 

 3/23 

 3/29 

 4/ 5 

 4/13 

 4/19 

 4/26 

 5/ 3 

 5/10 

 5/17 

 5/24 

 5/31 

 6/ 7 

 6/16 

 6/21 

 6/28 

 7/ 5 

 7/12 

 7/19 

 7/26 

 8/ 2 

 8/ 9 

 8/15 

 8/23 

 8/31 

 9/ 6 

 9/13 

 9/20 

 9/27 



Actinophrys 



Heterophrys 



Nuclearia 

 simplex 



Raphidiophrys 

 elegans 



3,200 

 6,400 



211,584 

 317,376 

 211,584 

 317,376 



158,688 



9,600 

 3,200 



1,600 



3,200 



38,400 



12,800 1,269,504 

 105,792 1,481,088 



3,200 



52.896 



1,600 

 476,064 



211,584 

 105,792 

 105,792 

 476,064 

 211,584 

 634,752 

 105,792 

 105,792 



