1920] 



Allen: Plankton of the San Joaquin River 



133 



11/26 

 11/30 



12/ 3 

 12/ 6 

 12/10 

 12/14 

 12/17 

 12/20 

 12/24 

 12/27 

 12/31 



Table 1. — Organisms Per Cubic Meter ix Plankton op 

 Stockton Channel in 1913 — {Continued) 



Coelastrum 

 microporum 



6,400 



52,896 



79,344 



3,200 



800 



800 



Pediastrum 

 boryanum 



6,400 

 1,600 

 3,200 

 1,600 

 800 

 800 



1,600 

 1,600 



Pediastrum 

 duplex 



32,000 

 79.344 

 52,896 

 19,200 

 19,836 

 33,060 

 400 

 13,224 

 13,224 

 39,672 

 33,060 



Pediastrum 

 simplex 



800 



Raphidiam 

 polymorphum 



Richteriella 

 botryoides 



79,344 



1,600 



105,792 



54,496 



59,908 



13,224 400 



53,296 



46,284 



13,224 



119,016 



85,9.56 



1913 



1/ 5 

 1/8 

 1/12 

 1/15 

 1/19 

 1/22 

 1/26 

 1/29 

 2/ 2 

 2/ 5 

 2/ 8 

 2/12 

 2/15 

 2/19 

 2/23 

 2/26 

 3/ 1 

 3/ 5 

 3/ 8 

 3/12 

 3/15 

 3/19 

 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 

 5/11 

 5/14 

 5/17 

 5/21 

 5/24 

 5/27 

 5/31 

 6/ 3 



Scenedesmus 

 obliquus 



6,612 



400 



13,224 



800 

 800 



3,200 

 1,600 



1,600 



6,400 

 52,896 



79^344 



1,600 



3^200 



264,480 



211,584 



423,168 



1,322,400 



2,591,904 



Scenedesmus 

 quadricauda 



400 

 33,060 



400 



400 



13,224 



800 



1,600 



52,896 



52,896 



39,672 



132,240 



6,400 



79,344 



6,400 



52,896 



132,240 



3,200 



105,792 



3,200 



3,200 



6,400 



105,792 



79,344 



6,400 



158,688 



52,896 



132,240 



132,240 



52,896 



1,600 



52,896 



18.5,136 



317,376 



19,200 



264,480 



1,057,920 



1,216,608 



3,385,344 



2,539,008 



Schroederia 

 setigera 



Selenastrum 

 bibraianum 



Stigeoclonium 

 sp. 



Ulothrix 

 sp. 



1,600 



iieoo 



3,200 



3,200 

 105,792 

 105,792 

 105,792 



400 

 400 



800 

 52,896 



3,200 



3,200 3,200 



