1920] 



Allen: Plankton of the San Joaquin River 



221 



1913 

 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 



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 



V 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 



Table 2. — Organisms Per Cubic Meter in Plankton of 

 San Joaquin River in 1913— (Continued) 



Brachionus 

 Asplanchna Asplanchnopus Brachionus angularis Brachionus Brachionus 



bnghtwellii sp. angularis caudatus budapestenensis calyciflorus 



6,400 1,600 



6,400 



3,200 



6,400 



6,400 

 3,200 



Brachionus 

 eapsuliflorus 



Brachionus 



egg, attached 



female 



3,200 



6,400 

 3,200 

 3,200 



400 



19,200 

 41,600 



16,000 

 12.800 

 6,400 



52,S96 



3,200 



19,200 

 3S,400 



12,800 



6,400 

 52,896 



3,200 

 3,200 



Brachionus 



egg, attached 



male 



105,792 

 6,400 



6,4(10 

 22,400 

 35,200 

 105,792 

 714,096 

 83,200 



211,584 



105,792 



1,005,024 



12,800 



317,376 

 25,600 

 38,400 



317,376 

 51,200 

 38,400 



211,584 

 64,000 



251666 



Brachionus 

 egg, free 

 female 



800 



4,000 



400 



800 



1,600 



3,200 



79,344 



6,400 



3,200 



6,400 



52,896 



52,896 



3,200 



3,200 



3,200 



3,200 



1,600 



19,200 



105,792 

 19,200 

 12,800 



105,792 



12,800 

 12,800 

 12.S00 



6,400 

 1,600 



Brachionus 

 patulus 



6,400 



19,200 



19,200 



25,600 



12,800 

 12,800 

 25,600 

 38,400 

 12,800 

 25,600 

 25,600 

 6,400 



1,600 



Brachionus 

 plicatilis 



400 



800 



1,600 

 3 200 



3,200 

 3,200 

 3,200 

 6,400 

 3,200 



3,200 



3,200 



