1920] Allen: Plankton of the San Joaquin Biver 141 



Table 1. — Organisms Per Cubic Meter in Plankton of 

 Stockton Channel in 1913 — {Continued) 



Fragillaria Gomphonema Gomphonema Gyrosigma Gyrosigma Gyrosigma 



1913 sp. constrictum sp. acuminatum kiitzingii scalproidea 



4/30 



5/ 3 



5/ 7 1,600 



5/11 52,896 



5/14 



5/17 6,400 3,200 



5/21 



5/24 3,200 



5/27 



5/31 3,200 



6/ 3 



6/ 7 



6/11 : 



6/16 



6/18 



6/21 



6/25 3,200 



6/28 



7/ 3 



7/ 5 



7/ 9 



7/12 



7/16 



7/19 



7/23 



7/26 



7/30 



8/ 2 25,600 



8/ 6 ■ 



8/ 9 3,200 



8/13 158,(iSS 



8/15 6,400 264,480 



8/20 3,200 



8/23 3,200 6,400 



8/27 : 158,688 



8/31 3,200 105,792 



9/2 3,200 158,688 



9/ 6 6,400 105,792 12,800 



9/ 9 6,400 



9/13 6,400 6,400 



9/17 3,200 6,400 



9/20 : 105,792 



9/24 ^ 105,792 



9/27 52,896 



10/ 1 52,896 



10/ 4 25,600 



10/ 8 52,896 12,800 



10/11 6,400 6,400 



10/15 52,896 105,792 



10/18 105,792 



10/22 12,800 



10/26 12,800 



10/29 



11/ 1 



11/ 5 



11/ 8 52,896 



11/12 



11/15 



11/19 3,200 



11/22 . 



