1920] 



Allen: Plankton- of the San Joaquin River 



207 



Table 2. — Organisms Per Cubic Meter in Plankton op 

 San Joaquin River in 1913 — (Continued) 



Stauroneis 

 phoenicenteron 



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 



400 

 400 



3,200 



3,200 



3,2f)0 



211,584 



.12,800 



6,400 

 3,200 



3,200 

 3,200 



12,800 



12,800 



12,800 

 6,400 



i?'206 



Surirella 

 sp. 



800 

 400 



34,260 



73,108 



120,192 



83,200 



118,400 



67,200 



264,480 



211,584 



264,480 



211,584 



264,480 



555,408 



185,136 



5.55,408 



211,584 



1,084,368 



978,576 



1,798,464 



634,7.52 



793,440 



1,428,192 



793,44 ) 



290,928 



528,960 



1.58,688 



581,856 



42.3,168 



9.52,128 



2,539,008 



4,707,744 



1,745,568 



2,010,048 



2,327,424 



1,269,.504 



1,481,088 



846,336 



1,163,712 



925,128 



1,269,.504 



634,752 



1,163,712 



423,168 



9.52,128 



83,200 



423,168 



317,376 



185,1.36 



238,032 



264,480 



528,960 



Synedra 

 radians 



476,064 



370,272 



370,272 



105,792 



370,272 



476,064 



1,0.57,920 



1,0.57,920 



211,. 584 



317,.376 



317,376 



423,168 



634,7.52 



105,792 



317,.376 



423,168 



52,896 



52,896 



185,136 



1,600 



"132^240 



52,896 



1,600 



Synedra 

 ulna 



125,6 8 

 .59,. 508 

 469,452 

 178, .524 

 290,928 

 264,480 

 238,032 

 264,480 

 185,136 

 370,272 

 581,856 

 290,928 

 370,272 

 661,200 

 687,648 

 .502,512 

 211,.584 

 502,512 

 819,888 

 899,232 

 740,.544 

 687,648 

 687,648 

 423,168 

 211,584 

 290,928 

 79,344 ' 

 1.58,688 

 105,792 

 2 11, .584 

 317,.376 

 317,376 

 105,792 

 211,584 

 4,866,432 

 2,750,.592 

 6,463,312 

 1,904,2.56 

 1,269,.504 

 2,433,216 

 2,327,424 

 846,336 

 634,752 

 476,064 

 1.58,688 

 105,792 

 1.58,688 

 1.58,688 

 317,376 

 185.1.36 

 132,240 

 264,480 



Tabellaria 

 sp. 



400 



6,400 



3,200 

 3,200 



Total 

 Bacillariaceae 



5,809,.536 



2,251,768 



10,974,996 



2,663,576 



11,996,848 



12,033,536 



,5,016,736 



6,8.56,748 



1.3,-325,744 



11,019,120 



10,801,04 ) 



9,1.34,064 



14,115,040 



5,200,608 



8,892,336 



14,298,672 



11,30.5,248 



7,678,572 



10,505,408 



16,196,288 



11,764,928 



21,702,976 



22,407,344 



16,107,296 



19,78.5,264 



29,834,3.52 



14,174,332 



25,030,060 



43,575,008 



44,644,3.52 



102,741, .536 



90,369,664 



90,117,192 



193,347,6.50 



178,086,636 



211,605,800 



132,958,752 



123,920,8.32 



74,401,376 



72,648,572 



1.32,110,672 



71,980,864 



47,266,700 



22,980,768 



10,205,.536 



5,766,976 



6,451,616 



18,058,240 



11,466,384 



6,2.52,5.52 



4,821,440 



5,190,960 



1913 



1/ 5 

 1/12 

 1/19 

 1/25 

 2/ 2 



Algae 

 unidentified 



Closterium 

 aeerosuni 



1,600 

 1,600 



Closterium 

 acuminatum 



Closterium 

 rostratum 



Mougeotia 

 sp. 



800 



400 



Spirogyra 

 protecta 



2,800 



