1920] 



Allen: Plankton of the. San Joaquin River 



139 



1913 



3/23 

 3/26 

 3/29 



4/ 2 

 4/ 5 

 4/ 9 

 4/13 

 4/16 

 4/19 

 4/23 

 4/26 

 4/30 

 5/ 3 

 5/ 7 

 5/U 

 5/14 

 5/17 

 5/21 

 5/24 

 5/27 

 5/31 

 6/ 3 

 6/ 7 

 6/11 

 6/16 

 6/18 

 6/21 

 6/25 

 6/28 

 7/ 3 

 7/ 5 

 7/ 9 

 7/12 

 7/16 

 7/19 

 7/23 

 7/26 

 7/30 

 8/ 2 

 8/ 6 

 8/ 9 

 8/13 

 8/15 

 8/20 

 8/23 

 8/27 

 8/31 

 9/ 2 

 9/ 6 

 9/ 9 

 9/13 

 9/17 

 9/20 

 9/24 

 9/27 

 10/ 1 

 10/ 4 

 10/ 8 

 10/11 

 10/15 



Table 1.— Organisms Pee Cubic Meter in Plankton op 

 Stockton Channel in 1913 — (Continued) 



Cymbella 

 tumida 



3,200 



3,200 



1,600 

 52,896 



6,400 

 25,200 



Diatom 

 unidentified 



1,600 

 1,600 



1,600 

 1.600 

 1,600 



Diatoma 

 vulgare 



Epithemia 

 ocellata 



6,400 



6,400 



3,200 



6,400 



6,400 



6,400 



6,400 



6,400 

 3,200 



3,200 



6,400 



6,400 

 6,400 

 6,400 



Fragillaria 

 capucina 



3,200 

 3,200 

 3,200 

 3,200 

 1,600 



3,200 



1,600 



6,400 

 1,600 

 3,200 

 3,200 



6,400 



6,400 



12,800 

 6,400 



3,200 



6,400 

 3,200 



6,400 



Fragillaria 

 crotonensis 



3,200 



105,792 105,792 



6,400 



