1920] 



Allen: Plankton of the San Joaquin River 



163 



Table 1. — Organisms Per Cubic Meter in Plankton op 

 Stockton Channel in 1913 — {Continued) 



1913 



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 



10/18 



10/22 



10/26 



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 



Nebela 

 sp. 



105,792 

 105,792 



Trinema 

 sp. 



158,688 



l65i7'92 

 3,200 



105,792 

 105,792 



211,584 

 211,584 



1,666 



Total 

 Rhizopoda 



108,992 

 846,326 

 317,376 

 161,888 

 168,288 

 112,192 

 264,480 

 3,200 

 9,600 

 115,392 

 3,200 

 267,680 

 323,168 

 158,688 

 158,688 

 264,480 

 264,480 

 211,584 

 370,272 

 370,272 



1, 



163,712 

 581,856 

 858,524 

 381,856 

 323,776 



137,046 



158,688 



6,400 



3,200 



3,200 

 1,600 

 800 

 400 

 400 

 400 

 1,200 

 400 



Actinophrys 

 sol. 



105,792 



581,856 

 52,896 



1,600 



Heterophrys Heterophrys 



fockei sp. 



528,960 



105,792 



317,376 



105,792 



211,584 211,584 



3,200 

 3,200 



211,584 

 211,584 



"158^688 



264,480 



158,688 



6,400 



52,896 



52,896 



105,792 



1913 



Nuclearia 

 simplex 



Pinaciophora Raphidiophrys Total 



fluviatilis elegans Heliozoa 



1/ 5 

 1/ 8 

 1/12 

 1/15 

 1/19 

 1/22 

 1/26 

 1/29 

 2/ 2 

 2/ 5 

 2/ 8 



Askenasia 

 elegans 



400 



soo 



1,600 



Bursaria 

 sp. 



400 



