1920] 



Allen: Plankton of the San Joaquin River 



165 



Table 1. — Organisms Per Cubic Meter in Plankton of 

 Stockton Channel in 1913 — (Continued) 



1913 



Nuclparia 

 simplex 



Pinaciophora 

 fluviatilis 



9/ 9 



9/13 



9/17 



9/20 



9/24 



9/27 



10/ 1 



10/ 4 



10/ S 



10/11 52,896 



10/15 105,792 



10/18 



10/22 105,792 



10/26 105,792 



10/29 



11/ 1 



11/ 5 



11/ 8 



11/12 



11/15 



11/19 



11/22 



11/26 



11/30 



12/ 3 



12/ 6 



12/10 



12/14 



12/17 



12/20 



12/24 



12/27 



12/31 



423,168 

 52,896 

 476,064 

 370,272 

 317,376 

 370,272 

 476,064 

 105,792 . 



79,344 

 52,896 



52,896 



Raphidiophrys 

 elegans 



3,200 



211,584 



4,549,056 



1,428,192 



3,702,720 



1,745,568 



819,888 



1,600 



1,600 



396,720 



1,600 



52,896 



400 



Total 

 Hetiozoa 



3,200 



"211,584 



211,584 



211,584 



52,896 



264,480 



1.58,688 



429,568 



105,792 



.528,960 



.581,8.56 



1,110,816 



423,168 



476,064 



4,654,848 



1,428,192 



3,782,064 



1,798,464 



819,888 



1,600 



.54,496 



398,320 



1.600 



52,896 



400 



Askenasia 

 elegans 



Bursaria 



105,792 



Chilodon 

 1913 sp. 



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 1,600 



Ciliate 

 unidentified 



Coleps 

 hirtus 



Colpoda 

 sp. 



Cyclidium 

 sp. 



26,448 



46,284 



.52,896 



800 



33,060 



3,200 



.52,896 



66,120 



1,600 



26,448 800 



105,792 



1,600 



52,896 



79,344 



.'52,896 '"'"''''-''''! 



400 



Didinium 

 nasutum 



400 



52,896 

 400 



4,800 



1,600 



39,672 



3,200 

 1,600 

 3,200 



