1920] 



Allen: Plankton of the San Joaquin Biver 



227 



Table 2. — Organisms Per Cubic Meter in Plankton op 

 San Joaquin River in 1913 — (Continued) 



1913 



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 



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 



Chydorus 

 sp. 



3,200 



Total 

 Copepoda 



400 



1,200 

 3,600 

 9,600 

 3,200 



3,200 



3,200. 



1,600 

 4,800 



3,200 

 3,200 



12.800 

 25,600 



3,200 

 3,200 

 3,200 

 9,600 

 19,200 



25,600 



12,800 



12,800 



19,200 



25,600 



211,584 



131,792 



118,592 



38,400 

 38,400 

 12,800 



3,200 

 6,400 



Sid a 

 sp. 



Total 



Entomostraca 



400 

 1,600 

 5,200 

 9,600 

 3,200 



3,200 

 3,200 



1,600 



11,200 



3,200 



"4^800 

 6,400 



12,800 

 25,600 



3,200 



3,200 



3,200 



12,800 



25,600 



32,000 



12,800 



57,600 



32,000 



64.000 



211, .584 



233,792 



169,792 



51,200 



12,800 



38,400 



51,200 



12,800 



6,400 



61400 



3,200 

 6,400 

 6,400 



6,400 



Total 

 Cladocera 



6,400 



6,400 



Chironomus 

 larva 



Canthocamptus 

 sp. 



Glochidia 



Cyclops 

 sp. 



6,400 



Insect 

 larva 



Nauplius 

 sp. 



400 



400 



3,200 

 3,200 



12,800 



"12,800 



6,400 



6,400 



16,000 



28,800 



32,000 



105,792 



105,792 



Macrobiotus 

 sp. 



400 



2,400 



3,200 



3,200 

 3,200 



6,400 

 3,200 

 3,200 

 3,200 

 6,400 



6,400 



6,400 



105,792 



3,200 



3,200 



