1920] 



Allen: Plankton of the Sam, Joaquin River 



241 



Table 3. — Organisms Per Cubic Meter in Plankton op 

 Smith's Canal in 1913 — (Continued) 



Stauroneis 



1913 phoenicenteron 



4/26 



5/ 3 



5/10 



5/17 



5/24 



5/31 



6/ 7 1,600 



6/16 3,200 



6/21 



6/28 



7/ 5 



7/12 



7/19 



7/26 



8/ 2 



8/ 9 



8/15 3,200 



8/23 



8/31 



9/ 6 



9/13 



9/20 



9/27 

 10/ 4 



10/11 



10/18 



10/26 



11/ 1 



11/ S 52,896 



11/15 



11/22 



11/30 



12/ 6 3,200 



12/14 



12/20 



12/27 



Synedra 

 radians 



Surirella 

 sp. 



54,400 



35,200 



105,792 

 158,688 



60,800 



132,240 ''''''''"''Z. 



79,344 



211,584 



105,792 



132,240 



449,616 



211,584 105,792 



1,428,192 793,440 



687,648 264,480 



4,125,888 158,688 



1,586,880 476,004 



2,274,528 1,057,920 



1,163,712 528,960 



634,752 423,168 



211,584 423,168 



634,752 317,376 



528,960 1,586,880 



423,108 1,269,504 



317,376 846,336 



740,544 634,752 



634,752 158,688 



476,064 158,688 



528,960 264,480 



52,896 211,584 



185,136 52,896 



158,688 52,896 



264,480 



105,792 



264,480 132,240 



79,344 1,600 



Synedra 

 ulna 



185,130 

 6,400 

 317,376 

 185,136 

 105,792 

 1,600 

 132,240 

 238,032 

 238,032 

 1,190,160 

 343,824 

 343,824 

 158,688 

 267,680 

 211,584 



370,272 



158,688 



4,125,888 



3,808,512 



5,924,364 



2,856,384 



2,539,008 



1,904,250 



2,221,632 



1,692,672 



476,064 



370,272 



528,960 



158,688 



79,344 



132,240 



290,928 



238,032 



105,792 



185,136 



Total Closterium 



Bacillariaceae acerosum 



14,915,728 6,400 



6,323,232 



8,531,408 



8,256,480 



5,198,768 



2,285,728 



8,722,096 



14,880,432 



17,599,024 3,200 



22,537,552 



15,092,112 



26,131,376 6,400 



24,800,128 



43,67.3.600 12,800 



53,M6,s:i2 6,400 



95,43S,68S 37,400 



149,512,496 



113,2.58,240 12,800 



llS,-lor,,MS 38,400 



22(l,iilMi,()',l6 76,800 



96,437,784 12,800 



157,322,752 25,600 



99,961,216 



84,452,672 



89,303,502 12,800 



57,291,968 



64,325,240 12,800 



30,671,584 6,400 



15,042,976 



6,757,696 3,200 



6,35 ,424 6,400 



7,324,400 3,200 



13,506.832 3,200 



7,003,072 3,200 



3,890,112 



4,581,056 



Closterium 



1913 acuminatum 



1/11 



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 1,600 



4/19 



4/26 



5/ 3 



5/10 



5/17 



5/24 



Closterium 

 rostratum 



Cosniarium 

 sp. 



1,600 



Mougeotia 

 sp. 



1,600 



400 



1,600 



1,600 

 1,600 



3,200 



Spirogyra 

 protecta 



1,200 

 6,400 



1,600 



3,200 

 6,400 



1,600 



Staurastrum 

 A 



1,600 

 79,344 



185,136 

 6,400 



"52,896 

 1,600 



