1920] Allen: Plankton of the San Joaquin River 155 



Table 1. — Organisms Per Cubic Meter in Plankton of 

 Stockton Channel in 1913 — {Continued) 



Hemidinium Mallomonas Pandorina Pcridinium Peridiniuni Phacus 



1913 nasutum sp. morum cinctum sp. pleuronectes 



2/12 



2/15 1,600 800 



2/19 16,000 



2/23 : 



2/26 



3/ 1 6,400 



3/ 5 



3/ 8 



3/12 3,200 



3/15 6,400 



3/19 



3/23 3,200 



3/26 79,344 



3/29 



4/ 2 



4/ 5 1,600 



4/ 9 6,400 



4/13 1,600 



4/16 3,200 



4/19 1,600 



4/23 1,600 



4/26 3,200 



4/30 



5/ 3 



5/ 7 



5/11 52,896 105,792 



5/14 : 



5/17 



5/21 6,400 



5/24 

 5/27 

 5/31 



6/ 3 158,688 



6/ 7 211,584 



6/11 



6/16 3,200 158,688 



6/18 3,200 317,376 3,200 



6/21 



6/25 



6/28 105,792 



7/ 3 423,168 



7/ 5 3,200 1,005,024 



7/ 9 3,200 



7/12 



7/16 



7/19 



7/23 



7/26 317,376 



7/30 62,896 3,200 



8/ 2 634,752 .- 



8/ 6 1,163,712 



8/ 9 952,128 



8/13 105,792 



8/15 1,745,568 3,200 



8/20 2,168,736 



8/23 1,533,984 



8/27 2,.380,.320 3,200 



8/31 4,125,888 158,688 



9/ 2 4,17.S,784 3,200 370,272 



9/ 6 4,866,432 3,200 



