222 University of California Publications in Zoology [Vol.22 



Table 2. — Organisms Per Cubic Meter in Plankton of 

 San Joaquin River in 1913 — (Continued) 



Brachionus Brachionus Brachionus 



Brachionus egg. attached egg, attached egg, free Brachionus Brachionus 



1913 capsuliflorus female male female patulus plicatilis 



5/24 



5/31 



6/ 7 



6/16 6,400 32,000 



6/21 3,200 



6/28 35,200 6,400 



7/ 5 1,600 79,344 



7/12 52,896 19,200 



7/19 19,200 105,792 25,600 



7/26 6,400 25,600 



8/ 2 12,800 3,200 25,600 



8/ 9 211,584 6,400 



8/15 25,600 3,200 6,400 



8/23 6,400 6,400 6,400 



8/31 25,600 64,000 



9/ 6 317,376 12,800 105,792 



9/13 38,400 12,800 12,800 



9/20 12,S00 38,400 25,600 



9/27 64,000 51,200 12,800 25,600 



10/ 4 12,800 89,600 64,000 



10/11 12,800 12,S00 



10/18 317,376 38,400 



10/26 25,600 



11/ 1 6,400 12,800 52,896 19,200 



11/ 8 



11/15 6,400 



11/22 



11/30 3,200 52,896 



12/ 6 1,600 3,200 



12/14 1,600 



12/20 



12/27 3,200 1,600 



Epiphanes Filinia 



Brachionus Diurella Epiphanes egg, attached egg, attached Filinia 



1913 urceus egg, free clavulata female female egg, free 



1/ 5 



1/12 1,200 



1/19 400 



1/25 



2/ 2 3,200 



2/ 8 3,200 



2/15 6,400 9,600 



2/23 3,200 19,200 



3/1 9,600 22,400 



3/8 3,200 105,792 



3/15 238,032 



3/23 3,200 



3/29 



4/ 5 



4/13 1,600 , 



4/19 3,200 



4/26 3,200 1,600 



5/ 3 



5/10 



5/17 3,200 



5/24 6,400 



5/31 



6/ 7 38,400 



6/16 32,000 6,400 



6/21 9,600 1,600 



