1920] 



Allen: Plankton of the San Joaquin River 



251 



Table 3. — Organisms Per Cubic Meter in Plankton of 

 Smith's Canal in 1913 — {Continued) 



Holophrya Paramecium Paramecium 



aurelia bursaria 



25,600 

 16,000 



1,600 



19,200 

 3,200 



Prorodon 



105,792 



52,896 



Stentor 

 coeruleus 



3,200 



Stentor 

 niger 



3,200 

 3,200 



3,200 



12,800 



6,400 

 3,200 



52,896 



3,200 



3,200 

 3,200 



Tintinnidium Vorticella 



1913 fluviatile longifilum 



1/11 



1/19 



1/25 



2/ 2 



2/ 8 1,600 



2/15 



2/23 3,200 



3/ 1 



3/ 8 



3/15 3,200 



3/23 1,600 



3/29 



4/ 5 



4/13 



4/19 



4/26 



5/ 3 



5/10 



5/17 



5/24 3,200 



Vorticella 

 sp. 



6,400 



1,600 



1,600 



1,600 



1,600 



105,792 



158,688 



158,688 



Total Acineta 



Ciliata sp. 



2^400 "Z'Z'Z 



1,600 



11,200 



14,400 



28,200 



8,000 



25,600 



72,096 



48,000 



12,800 



108,992 



120,192 



6,400 



113,792 



4,800 



105,792 



168,288 



214,784 



Sphaerophrya. 

 sp. 



