222 



University of California I'ublications in Zoologij [Vol.22 



Table 2. — Organisms Per Cubic Meter in Plankton of 

 San Joaquin River in 1913 — (Continued) 



1913 



5/24 



5/31 



6/ 7 



6/16 



6/21 



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 



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 



Brachionus 

 Brachionus egg, attaclied 

 capsuliflorus female 



12,800 



211,584 



25,600 



"'25,600 

 317,376 

 38,400 

 12,800 

 64,000 

 12,800 

 12,800 



6,400 



3,200 



Brachionus 

 urceus 



1/200 

 400 



3,200 

 3,200 

 6,400 



1,600 

 3,200 

 3,200 



6,400 



38,400 



32,000 



9,600 



6,400 



3,200 



35,200 



1,600 



191,266 

 6,400 

 3,200 



3,200 



6,400 

 64,000 

 12,800 

 12,800 

 38,400 

 51,200 

 89,600 

 12,800 

 317,376 



'12^866 



3,200 



Diurella 

 egg, free 



Brachionus 



egg, attached 



male 



32,000 



Epiphanes 

 clavulata 



Brachionus 

 egg. free 

 female 



6,400 



79,344 



.52,896 



105,792 



6,400 



(i,4()0 

 6,400 



25,600 

 12,800 

 64,000 



38^406 



25,600 

 52,896 



6,400 



52is96 



1,600 

 1,600 



1,600 



Epiphanes 



egg, attached 



female 



Brachionus 

 patulus 



19,200 

 25,600 

 25,600 

 25,600 



6,400 



"165,792 

 12,800 



'25,606 



3,200 



Filinia 



egg, attached 



female 



3,200 



9,600 

 3,200 



3,200 



6,400 



Brachionus 



plicatilid 



19,200 



Filinia 

 egg, free 



9,600 



19,200 



22,400 



105,792 



238,032 



1,600 

 "3'266 



1,600 



