1920] Allen: Plankton of the San Joaquin River 143 



Table 1. — Organisms Per Cubic Meter in Plankton of 

 Stockton Channel in 1913 — {Continued) 



Melosira Melosira Melosira Navicula Navicula Navicula 



1913 granulata granulata A varians affinis alpestris bacillum 

 {small) 



6/7 528,960 3,200 



6/11 370,272 211,584 



6/16 1,322,400 264,480 



6/18 1,375,296 211,584 



6/21 634,752 6,400 



6/25 2,062,944 3,200 



6/28 7,617,024 6,400 158,688 



7/ 3 3,067,968 6,400 3,200 



7/ 5 1,005,024 3,200 



7/ 9 1,481,088 



7/12 2,697,696 3,200 



7/16 1,586.880 105,792 



7/19 2,168,736 



7/23 1,428,192 



7/26 2,962,176 



7/30 2,539,008 



8/ 2 3,914,304 3,200 



8/6 3,385,344 



8/9 4,972,224 ; 



8/13 10,314,720 3,200 105,792 



8/15 10,103,136 ; 3,200 3,200 



8/20 5,342,496 6,400 1.58,688 



8/23 4,760,640 211,584 



8/27 6,083,040 105,792 



8/31 8,357,568 3,200 



9/ 2 7,828,608 211,584 



9/ 6 16,5.56,448 158,688 



9/ 9 10,420,512 264,480 



9/13 5,025,120 370,272 



9/17 8,251,776 105,792 



9/20 8,410,464 105,792 



9/24 15,604,320 52,896 105,792 105,792 



9/27 5,183,808 264,480 



10/ 1 8,145,984 6,400 264,480 



10/ 4 5,236,704 52.896 



10/ 8 8,040,192 52,896 52,896 



10/11 5,289,600 6,400 105,792 



10/15 7,828,608 ■ 6,400 264,480 



10/18 4,601,952 52,896 158,688 



10/22 4,654,848 



10/26 3,544,032 ....: 52,896 52,896 



10/29 2,7.50,592 52,896 211,584 



11/ 1 2,010,048 



11/ 5 1,798,464 52,896 52,896 



11/ 8 899,232 264,480 



11/12 1,137,264 1,600 



11/15 1,005,024 105,792 



11/19 740,.544 52,896 



11/22 978,576 52,896 



11/26 1,137,264 



11/30 1,084,368 1,600 52,896 



12/ 3 1,745,568 3,200 .; 1,600 



12/ 6 1,0.57,920 1,600 



12/10 3.50,4.36 2,400 33,060 



12/14 257,868 400 400 



12/17 337,212 33.060 



12/20 370,272 800 400 19,8.36 



12/24 271,092 800 800 39,672 



12/27 .588,468 26,448 400 



12/31 925,680 33,060 13,224 46,284 



