1920] 



Allen: Plankton of the San Joaquin River 



191 



Table 1. — Organisms Per Cubic Meter in Plankton of 

 Stockton Channel in 1913 — (Continued) 



Tolal 

 Rotifera 



Bosmina 

 longirostris 



1913 



2/26 5,123,216 



3/ 1 3,680,128 



3/ 5 13,367,344 



3/ 8 12,086,440 



3/12 16,017,648 



3/15 3,744,384 



3/19 5,384,096 



3/23 4,386,224 



3/26 4,406,272 



3/29 6,305,728 



4/ 2 7,943,152 



4/ 5 8,178,640 



4/ 9 8,062,.592 



4/13 6,318,432 



4/16 5,449,792 



4/19 9, 422, .544 



4/23 5,106,720 



4/26 9,577,936 



4/30 8,168,240 



5/ 3 6,995,472 



5/ 7 14,039,840 



5/11 13,164,608 • 



5/14 8.677,760 



5/17 6,493,024 



5/21 5,411,648 



5/24 ■ 2,846,208 



5/27 2,793,020 



5/31 3,207,264 



6/ 3 7.493,536 



6/ 7 4,024,608 



6/11 2,559,872 



6/16 3,477.760 



6/18 4,819,736 



6/21 7,942,304 



6/25 18,702,.592 



6/28 18,070,648 



7/ 3 4,290,592 • 



7/ 5 7,289,856 



7/ 9 5,1.37,320 



7/12 8,792,840 



7/16 4,386,976 



7/19 3,.548,7.36 



7/23 3,745,632 



7/26 6,010,7.52 



7/30 4,271,784 6,400 



8/ 2 3,680,6.32 6,400 



8/ 6 2,801,792 



8/ 9 6,405,868 



8/13 6,188,640 



8/15 5,867,680 



8/20 9,467,192 3,200 



8/23 6,7.57,696 



8/27 4,787,776 



8/31 2,792,192 



9/ 2 2,6.52,512 



9/ 6 2,644,000 



9/ 9 6,600,704 6,400 



9/13 7,638,3.36 -. 



9/17 2,7.36,096 6,400 



9/20 2,017,760 



9/24 2,831,400 6,400 



Bosmina 

 Bp. 



3,200 



6,400 



Sida 

 Bp. 



6,400 

 6,400 

 6,400 



6,400 

 6,400 



6,400 

 6,400 



12,800 

 6,400 

 6,400 



"6,400 



19,200 

 6,400 

 6,400 



25,600 



6,400 

 12^860 

 12,800 



Total Canthocamptus 



Cladocera sp. 



3,200 



3,200 

 6,400 



6,400 

 6,400 

 6,400 



6,400 

 6,400 



6,400 



'6;4b6 



12,800 



"6,400 



6,400 



12,800 



"6,400 



"3,200 



19,200 



6,400 



6,400 



25,600 



"l2,800 



19,200 



19,200 



3,200 



3,200 



