1920] 



Allen: Plankton of the San Joaquin River 



211 



Table 2. — Organisms Per Cubic Meter in Plankton of 

 San Joaquin River in 1913 — {Continued) 



1913 

 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 



Euglena 

 viridis 



211,584 

 3,200 



1,600 



105,792 

 3,200 

 3,200 

 3,200 

 6,400 



105,792 

 105,792 



Flagellate 

 unidentified 



Hemidinium 

 nasutum 



105,792 

 211,584 

 105,792 



211,584 

 105,792 



211,584 

 528,960 



52,896 



Pandorina 

 morum 



105,792 

 6,400 

 1,600 



79,344 



105,792 



3,200 



6,400 



105,792 



12,800 

 105,792 



6,400 



"6,400 

 52,896 

 52,896 



3,200 

 6,400 



Peridinium 

 cinctum 



52,896 



3,200 



3,200 



105,792 



"52,896 

 52,896 



Phacus 

 pleuronectes 



52,896 

 1,600 



1913 



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 



Platydorina 

 caudata 



Pleodorina 

 californica 



Pleodorina 

 iilinoisensis 



Pteromonas Trachelomonas Trachelomonas 

 sp. euchlora volgensis 



66,120 

 1,600 



"52,896 



"132,240 

 79,344 

 79,344 



132,240 

 52,896 

 79,344 

 52,896 



132,240 

 52,896 



3,200 



211,584 



3,200 



