1920] 



Allen: Plankton of the San Joaquin River 



177 



Table 1. — Organisms Per Cubic Meter in Plankton op 

 Stockton Channel in 1913 — (Continued) 



Rotaria 



1913 neptunia 



4/30 



5/ 3 



5/ 7 



5/11 



5/14 



5/17 



5/21 



5/24 



5/27 



5/31 



6/ 3 



6/ 7 



6/11 



6/16 



6/18 



6/21 



6/25 



6/28 



7/ 3 6,400 



7/ 5 



7/9 



7/12 



7/16 



7/19 



7/23 



7/26 



7/30 6,400 



8/ 2 6,400 



8/ 6 6,400 



8/ 9 6,400 



8/13 



8/15 57,600 



8/20 25,600 



8/23 12,800 



8/27 32,000 



8/31 



9/ 2 



9/ 6 



9/ 9 



9/13 



9/17 



9/20 12,800 



9/24 12,800 



9/27 



10/ 1 



10/ 4 25,600 



10/ 8 6,400 



10/11 6,400 



10/15 158,688 



10/18 38,400 



10/22 12,800 



10/26 19,200 



10/29 19,200 



11/1 76,800 



11/5 158,688 



11/ 8 105,792 



11/12 105,792 



11/15 6,400 



11/19 19,200 



11/22 12,800 



Rotaria 

 rotatoria 



79,344 



79,344 



105,792 



1,600 



6,400 



370,272 



3,200 



25,600 



6,400 



6,400 



6,400 



19,200 

 19,200 



158,688 

 423,168 

 158,688 



19,200 



6,400 



211,584 



19,200 



317,376 



12,800 



6,400 



32,000 



32,000 



370,272 



105,792 



153,600 



237,184 



16,000 



105,792 



6,400 



"l2,800 



211,584 

 6,400 



"52,896 



6,400 



12,800 



"65,696 



19,200 



105,792 



19,200 



25,600 



211,.584 



158,688 



105,792 



79,344 



105,792 



317,376 



132,240 



Rotifer egg, 

 winter 



6,400 



Rotifer egg, 

 unidentified 



6,400 



3,200 



19,200 

 3,200 



264,480 



3,200 



6,400 



6,400 



6,400 

 3,200 

 6,400 



Rotifer 

 unidentified 



79,344 



158,688 



1,600 



6,400 

 211,584 

 264,480 

 264,480 



6,400 

 3,200 

 6,400 

 3,200 

 12,800 

 3,200 

 6,400 

 6,400 



158,688 



3,200 



3,200 



19,200 



158,688 



"26,500 

 3,200 

 3,200 



211,584 



317,376 

 317,376 

 158,688 



6,400 

 158,688 

 105,792 



3,200 

 105,792 



3,200 

 105,792 



6,400 



211,584 

 105,792 

 211,584 



264^480 



52,896 



211,584 



105,792 



52,896 

 52,896 



Total 

 Bdelloida 



158,688 



238,032 



107,392 



1,600 



12,800 



581,8.56 



267,680 



290,080 



6,400 



12,800 



9,600 



6,400 



3,200 



12,, 800 



22,400 



25,600 



165,088 



423,168 



165,088 



177,,888 



9,600 



214,784 



38,400 



1.58,688 



317,.376 



38,400 



16,000 



41,600 



249,984 



376,672 



105,792 



528,576 



262,784 



35,200 



296,480 



105,792 



3,200 



112,192 



3,200 



118,592 



230,784 

 19,200 



52^896 



32,000 

 230,784 

 112,192 

 435,968 

 57,600 

 389,472 

 91,296 

 256,384 

 394,176 

 317,376 

 211,584 

 186,136 

 112,192 

 489,472 

 207,936 



