1920] 



Allen: Plankton, of the San Joaquin River 



173 



Table 1.— Organisms Per Cubic Meter in Plankton of 

 Stockton Channel in 1913 — (Continued) 



2/15 



2/19 



2/23 



2/26 



3/ 1 



3/ 5 



3/ 8 



3/12 



3/15 



3/19 



3/23 



3/26 



3/29 



4/ 2 



4/ 5 



4/ 9 



4/13 



4/16 



4/19 



4/23 



4/26 



4/30 



5/ 3 



5/ 7 



5/11 



5/14 



5/17 



5/21 



5/24 



5/27 



5/31 



6/ 3 



6/ 7 



6/11 



6/16 



6/18 



6/21 



6/25 



6/28 



7/ 3 



7/ 5 



7/ 9 



7/12 



7/16 



7/19 



7/23 



7/26 



7/30 



8/ 2 



8/ 6 



8/ 9 



8/13 



8/15 



8/20 



8/23 



8/27 



8/31 



9/ 2 



9/ 6 



9/ 9 



Vorticella 

 longifilum 



1,600 



3,200 

 '3i206 



79,344 



105,792 



1,600 



1,600 

 i,QOO 



3,200 

 6,400 



12,800 



Vorticella 

 sp. 



6,400 



3,200 



1,600 

 1,600 



1,600 



79,344 



528,960 



687,648 



396,720 



396,720 



1,533,984 



1,692,672 



740,544 



1,428,192 



1,163,712 



1,322,400 



1,428,192 



2,433,216 



1,745,568 



1,798,464 



2,591,904 



3,596,928 



1,851,360 



2,062,944 



1,692,672 



2,644,800 



476,064 



740,544 



1,110,816 



1,057,920 



476,064 



1,269,504 



899,232 



1,639,776 



634,752 



687,648 



2,168,736 



1,375,296 



1,586,880 



793,440 



740,544 



1,851,360 



899,232 



899,232 



634,752 



Total 

 Cilia ta 



649,152 



272,856 



411,920 



484,720 



780,544 



302,128 



460,816 



1,538,782 



248,288 



893,584 



778,944 



345,424 



281,232 



399,728 



370,176 



364,624 



70,408 



387,272 



340,.528 



278,784 



411,120 



766,144 



910,432 



554,560 



586,656 



1,639,776 



2,915,680 



849,536 



1,699,072 



1,170,112 



1,322,400 



1,428,192 



2,433,216 



1,904,256 



1,801,604 



2,595,104 



3,600,128 



1,873,360 



2,221,632 



1,702,272 



2,806,688 



687,648 



743,744 



1,116,216 



1,057,920 



476,064 



1,487,488 



1,117,216 



1,748,768 



743,744 



1,428,192 



2,968,576 



2,128,640 



1,804,864 



1,229,408 



1,014,624 



2,028,048 



1,216,208 



1,692,672 



1,110,816 



Acineta Podophrya Sphaerophrya 



sp. sp. sp. 



3,200 



