1920] 



Allen: Plankton of the San Joaquin River 



149 



Table 1. — Organisms Per Cubic Meter in Plankton of 

 Stockton Channel in 1913 — (Continued) 



1913 



10/26 

 10/29 

 11/ 1 

 11/ 5 

 11/ 8 

 11/12 

 11/15 

 11/19 

 11/22 

 11/26 

 11/30 

 12/ 3 

 12/ 6 

 12/10 

 12/14 

 12/17 

 12/20 

 12/24 

 12/27 

 12/31 



Surirella 

 sp. 



6,400 

 12,800 

 105,792 

 6,400 

 6,400 

 1,600 



31200 



52,896 

 3,200 

 3,200 



6,400 



800 



400 



4,000 



19,836 



46,284 



26,448 



Synedra 

 radians 



846,336 



793,440 



740,544 



528,960 



634,752 



1,243,056 



158,688 



290,928 



79,344 



132,240 



158,688 



79,344 



1,600 



39,672 



52,896 



33,060 



52,896 



33,060- 



46,284 



26,448 



Synedra 

 ulna 



528,960 

 793,440 

 211,584 

 528,960 

 264,480 

 476,064 

 105,792 

 370,272 

 423,168 

 211,584 

 396,720 

 925,680 

 158,688 

 113,204 

 191,784 

 125,628 

 370,27:' 

 138,852 

 621,528 

 509,124 



Total 

 Bacillariaceae 



Closterium 

 acerosum 



40,861,312 



38,450,896 



17,098,208 



13,467,584 



11,233,152 



17,409,184 



10,962,272 



10,547,104 



11,546,480 



10,301,072 



10,874,080 



12,398,464 



9,041,168 



3,751,992 1,600 



3,943,.552 



3,598,928 800 



3,976,400 



2,071,744 



4,627,788 



3,671,048 



Closterium 

 rostratum 



105,792 



"52,896 

 6,400 



1,600 

 •1,600 

 1,600 

 3,200 



400 



1913 



1/ 5 

 1/ 8 

 1/12 

 1/15 

 1/19 

 1/22 

 1/26 

 1/29 

 2/ 2 

 2/ 5 

 2/ 8 

 2/12 

 2/15 

 2/19 

 2/23 

 2/26 

 3/ 1 

 3/ 5 

 3/ 8 

 8/12 

 3/15 

 3/19 

 3/23 

 3/26 

 3/29 

 4/2 

 4/ 5 

 4/ 9 

 4/13 

 4/16 

 4/19 

 4/23 

 4/26 

 4/30 



Closterium 

 sp. 



400 



Mougeotia 

 sp. 



800 



800 



3,200 



Staurastrum 

 A 



800 



Straurastrum 

 sp. 



Total 

 Conjugatae 



Total 

 Algae 



1,600 

 800 



1,600 



3,200 



1,600 



3,200 



1,197,572 



400 456,016 



400 916,456 



3,277,140 



6,283,188 



21,036 2,923,468 



800 816,476 



1,785,028 



1,484,476 



1,963, .576 



1,600 1,721,896 



800 1,697,048 



1,600 3,354,048 



1,600 3,979,576 



800 2,138,664 



5,513,136 



600 7,021,272 



6,930,128 



2,694,400 



3,275,.504 



3,307,504 



3,200 4,551,808 



3,200 4,572,420 



2,764,144 



2,697,600 



1,600 2,5.37,312 



6,400 3,652,176 



7,633,176 



4,742,848 



11,720,416 



11,912,800 



3,200 19,719,760 



3,200 20,040,240 



19,407,184 



