1920] 



Allen: Plankton of the San Joaquin River 



229 



1913 



1/11 

 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 



s/n 



8/23 

 8/31 

 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 



1/11 

 1/19 

 1/25 

 2/ 2 

 2/ 8 

 2/15 



Table 3. — Organisms Per Cubic Meter in Plankton op 

 Smith's Canal in 1913 



Spirillum Total Anabaena Aphanocapsa Coelosphaerium Gloeocapsa 



undula Bacteriacoae sp. sp. kutzingianum conglomerate 



1,600 



1,600 



1,600 

 1,600 



1,600 



3,200 

 105,792 



3,200 

 105,792 



1,600 



1,600 



1,600 



Gomphospha 

 aponina 



1,600 



3,200 



12,800 

 "52J896 



132,240 



Inactis 

 tinctoria 



Agardh 



6,400 



3,200 



3,200 



105,792 



185,136 



105,792 



6,400 



158,688 



105,792 



Merismopedium Microcystis 

 glaucum sp. 



3,200 

 3,200 



