1920] 



Allen: Plankton, of the San Joaquin River 



223 



Table 2 — Organisms Per Cubic Meter in Plankton of 

 San Joaquin River in 1913 — (Continued) 



1913 



6/28 



7/ 5 



7/12 



7/19 



7/26 



8/ 2 



8/ 9 



8/15 



8/23 



8/31 



9/ 6 



9/13 



9/20 



9/27 



10/ 4 



10/11 



10/18 



10/26 



11/ 1 



11/ 8 



11/15 



11/22 



11/30 



12/ 6 



12/14 



12/20 



12/27 



Brachionus 

 urceus 



25,600 



3,200 



38,400 



12,800 



105,792 



51,200 



6,400 



38,400 



12,'800 



12,800 



12,800 

 12,800 



3,200 



Diurella 

 egg, free 



79,344 



158,688 

 1,031,472 

 476,064 

 317,376 

 423,168 

 158,688 

 528,960 

 1,110,816 

 317,376 



"952,128 



528,960 

 846,336 

 528,960 

 105,792 

 25,600 



Epiphanes 

 ciavulata 



12,800 

 64,000 

 76,800 

 12,800 

 64,000 

 38,400 

 38,400 

 12,800 



12,800 



Epiphanes 



egg. attached 



female 



6,400 

 12,800 



12,800 

 25,600 



Filinia 



egg, attached 



female 



9,600 



Filinia 

 egg. free 



1,600 

 1,600 



238,032 



3,200 



528,960 



3,200 



158,688 

 158,688 

 528,960 



105,792 

 105,792 

 211,584 

 105,792 

 105,792 



1,600 



1913 



1/ 5 

 1/12 

 1/19 

 1/25 

 2/ 2 

 2/ 8 

 2/15 

 2/23 

 3/ 1 

 3/ 8 

 3/15 

 3/23 

 3/29 

 4/ 5 

 4/13 

 4/19 

 4/26 

 5/ 3 

 5/10 

 5/17 

 5/24 

 5/31 

 6/ 7 

 6/16 

 6/21 

 6/28 

 7/ 5 

 7/12 

 7/19 

 7/26 



FiUnia 

 longiseta 



400 



79,344 



57,600 



290,928 



44,800 



38,400 



28,800 



3,200 



3,200 



1,600 

 6,400 



Keratella 

 cochlearis 



400 

 1,200 



12,800 



6,400 



57,600 



3,200 



9,600 



1,200 



3,200 



6,400 



12,800 



99,200 



32,000 



238,032 



211,584 



555,408 



264,480 



204,480 



105,792 



793,440 



132,240 



6,400 



" 38,400 



12,800 



38,400 



32,000 



211,584 



238,032 



555,408 



,798,464 



634,752 



25,600 



Keratella 

 egg, attached 



800 



1,200 



1,600 



16,000 



6,400 



25,600 



12,800 



158,688 



52,896 



211,584 



79,344 



1,600 



1,600 



1,600 



1,600 



6,400 



9,600 



79,344 



Keratella 

 egg, free 



1,200 



2,400 



19,836 



33,060 



17,600 



132,240 



132,240 



6,400 



1,600 



132,240 



79,344 



79,344 



185,1.36 



3,200 



1,600 



3,200 

 105,792 



3,200 

 105,792 

 105,792 



3,200 

 158,688 



1,600 

 18.5,136 

 423,168 

 211,.584 



6,400 



Keratella 

 quadrata 



1,200 

 1,200 

 1,600 

 1,200 

 20,800 

 22,400 

 6,400 

 6,400 



19,200 



9,600 



79,344 



158,688 



19,200 



28,800 



105,792 



41,600 



79,344 



44,800 



3,200 



12,800 



38,400 



158,688 

 9,600 



12,800 



3,200 



57,600 



12,800 



Lecane 

 luna 



3,200 



12,800 



6,400 



