1920] 



Allen: riankton of the San Joaquin River 



199 



Table 2.— Organisms Per Cubic Meter in Plankton of 



San Joaquin River in 1913 — (Continued) 



Actinastrum 

 hantzschii 



1913 (large) 



4/19 26,448 



4/26 52,896 



5/ 3 



5/10 



5/17 



5/24 



5/31 105,792 



6/ 7 



6/16 



6/21 105,792 



6/28 



7/ 5 



7/12 105,792 



7/19 581,856 



7/26 476,064 



8/ 2 158,688 



8/ 9 317,376 



8/15 528,960 



8/23 1,533,984 



8/31 1,586,880 



9/ 6 423,168 



9/31 528,960 



9/20 102,400 



9/27 634,752 



10/ 4 1,163,712 



10/11 740,544 



10/18 64,000 



10/26 51,200 



11/1 25,600 



11/ 8 



11/15 



11/22 52,896 



11/30 



12/ 6 



12/14 



12/20 



12/27 



Richteriella 



1913 botryoides 



1/ 5 



1/12 



1/19 



1/25 



2/ 2 



2/ 8 



2/15 



2/23 



3/ 1 



3/ 8 



3/15 1,600 



3/23 



3/29 1,600 



4/ 5 



4/13 



4/19 



4/26 1,600 



5/ 3 



5/10 



5/17 



Coelastrum 

 microporum 



158,688 



3,200 



"317,376 

 105,792 

 317,376 

 317,376 

 105,792 



l65,7'92 



105,792 



52,896 

 52,896 



Scenedesmus 

 obliquus 



400 



1,600 



1,600 

 3,200 

 1,600 



1,600 



Pediastrum 

 boryanum 



79,344 



105,792 



6,400 



iiscid 



3,200 



9,600 



1,600 



3,200 



25,600 



6,400 



25,600 



158,688 



3,200 



158,688 



12,800 



25,600 



211,584 



105,792 



76,800 



51,200 



25,600 



12,800 



25,600 



158,688 



19,200 



6,400 



9,600 



6,400 



6,400 



Scenedesmus 

 quadricauda 



400 



400 



400 



400 



105,792 



52,896 



1,600 



12,800 



3,200 



3,200 



52,896 



132,240 



211,584 



105,792 



Pediastrum 

 duplex 



132,240 



16,000 



1,600 



6,400 



6,400 



32,000 



132,240 



158,688 



661,200 



1,322,400 



1,798,464 



2,062,944 



899,232 



1,481,088 



2,697,696 



2,433,216 



2,010,048 



2,327,424 



2,539.008 



1,692,672 



4,241,680 



4,866,432 



846,336 



1,163,712 



793,440 



476,064 



89,600 



79,344 



79,344 



19,200 



52,890 



12,800 



52,896 



Schroederia 

 setigera 



Pediastrum 

 simplex 



1,600 



1,600 



35,200 



12,800 



6,400 



105,792 



.32,000 



476,064 



25,600 



528,960 



25,600 



38,400 



38,400 



25,600 



25,600 



211, .584 



12,800 



52,896 



Raphidium 

 polymorphum 



1,600 

 52,896 



3,200 



Stigeoclonium 

 sp. 



105,792 



1,600 

 52,896 



3,26b 



3,200 



108,992 

 3,200 



317,376 



211,584 

 211,584 

 634,752 

 .528,960 



52,896 



105J92 

 1,600 



79,344 



3,200 



3,200 



Total 

 Chloropbyceae 



2,800 

 1,600 



29,648 



21,036 

 145,792 

 164,896 



64,000 

 201,136 



73,600 

 210,736 

 427,968 

 233,040 

 762,096 

 121,792 

 177,792 

 240,232 

 321,328 

 9,600 



22,i66 



