1920] 



Allen: Plankton of the San Joaquin River 



151 



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 in Plankton of 

 Stockton Channel in 1913 — (Continued) 



Closterium 

 sp. 



Mougeotia 

 sp. 



Staurastrum 

 A 



Straurastrum 

 sp. 



6,400 



400 



400 



Total 

 Conjugatae 



1.600 



8,000 



3,200 



21,336 



1,200 



400 



400 



Total 

 Algae 



12,232,528 

 13,796,160 

 9,832,912 

 4,144,964 

 4,602,940 

 4,230,268 

 4,599,528 

 2,282,716 

 5,1.53,036 

 4,127,276 



Total 

 Chlorophyll 

 bearing 



Ceratium 

 hirundinella 



1913 



1/ 5 1,197,-572 



1/ 8 456,016 



1/12 917,256 



1/15 4,2.55,716 



1/19 7,257,952 



1/22 3,024,248 



1/26 1,0.59,168 



1/29 2,079,5.56 



2/ 2 1,513,724 



2/ 5 2,157,088 



2/ 8 2,259,656 



2/12 1,9.50,704 



2/15 3,675,424 



2/19 5,542,1.36 



2/23 2,528,560 



2/26 6,268,080 



3/ 1 7,113,.336 



3/ 5 7,019,072 



3/ 8 2,755,296 



3/12 3,322,000 



3/15 3,4S8,.592 



3/19 4,599,504 



3/23 4,686,212 



3/26 3,117,568 



3/29 3,179,968 



4/ 2 2,697,600 



4/ 5 3,666,576 



4/ 9 7,647,576 



4/13 4,755,648 



4/16 12,156,384 



4/19 11,976,896 



4/23 20,939,568 



4/26 20,254,224 



4/30 19,542,624 



6/ 3 22,294,816 



5/ 7 21,378,688 



5/11 35,.355,328 



5/14 64,300,640 



5/17 50,683,376 



5/21 42,053,824 



5/24 45,854,640 



5/27 77,086,976 



5/31 83,517,888 



6/ 3 90,601,152 



Cercomonas 

 crassicauda 



Cercomonas Chlamydomonas Chromulina 

 sp. sp. sp. 



945,516 



958,740 



99,180 



251,256 



271,092 



13,224 



152,076 



462,840 



251,256 



317,376 



1,481.088 



277,704 



687,648 



423,168 



1,600 



79,344 



158,688 



423,168 



79,344 



1,600 



1,600 

 317,376 



52,896 



290,928 



158,688 



132,240 



79,344 



52,896 



132,240 



105,792 



317,.376 



'3,206 264^480 



1,322,400 



105,792 



