1920] 



Allen: Plankton of the San Joaquin River 



253 



Table 3. — Organisms Per Cubic Meter in Plankton op 

 Smith's Canal in 1913 — {Continued) 



Total Protozoa 

 Total without 



1913 Suctoria Mastigophora 



7/ 5 955,328 



7/12 1,569,432 



7/19 1,229,108 



7/26 105,792 1,715,072 

 8/ 2 44,800 2,596,608 

 8/ 9 12,800 1,509,888 



8/15 5,504,384 



8/23 1,665,376 



8/31 105,792 3,292,352 

 9/ 6 38,400 5,036,224 

 9/13 12,800 1,387,096 



9/20 2,433,216 



9/27 1,464,896 



10/ 4 5,209,408 



10/11 64,000 3,144,768 

 10/18 12,800 1,599,680 

 10/26 6,400 1,577,384 



11/ 1 726,048 



11/ 8 1,314,404 



11/15 1,480,992 



11/22 3,200 112,000 



11/30 148,040 



12/ 6 3,200 135,344 



12/14 62,496 



12/20 138,640 



12/27 75,296 



Total Rotaria 



1913 Rhizota neptunia 



1/H 



1/19 



1/25 3,200 



2/ 2 1,600 



2/ 8 



2/15 



2/23 3,200 



3/ 1 



3/ 8 3,200 3,200 



3/15 



3/23 3,200 



3/29 



4/ 5 



4/13 



4/19 



4/26 



5/ 3 



5/10 



5/17 3,200 



5/24 



5/31 



6/ 7 



6/16 



6/21 



6/28 



7/ 5 



7/12 



7/19 



7/26 



8/ 2 12,800 



Total Protozoa 



with Collotheca 



Mastigophora egg, attached 



2,293,728 



3,506,536 



3,785,920 



6,768,992 



5,222,016 



5,597,184 



14,496,704 



6,329,824 25,600 



7,761,216 



11,922,112 



6,904,696 51,200 



6,254,522 3S.400 



6,671,504 



11,066,380 105,792 



6,644,704 423,168 



4,456,064 25,600 



3,507,240 52,896 



4,765,344 



6,398,820 52,896 



4,803,592 



9,163,520 6,400 



4,094,344 



2,849,040 



2,935,264 



2,459,040 



2,703,248 



Rotaria Rotifer egg, 



rotatoria winter 



1,600 



36,800 



19,836 



11,200 



35,200 



80,000 6,400 



35,200 



79,344 



185,136 



2S.SO0 3,200 

 64,000 



60,800 



16,000 



6,400 



19,200 



3,200 6,400 



1,600 ' 



12,800 



3,200 



9,600 



6,400 ZZZZZ. 



6,400 3,200 



52,896 6,400 



6,400 



6,400 



Collotheca Collotheca 



pelagica sp. 



19,200 """""""" 



12,800 



51,200 ZZZZZ. 



51,200 



12,800 '"211,584 



153,600 



64,000 



105,792 



12,800 



52.S96 



3,200 



3,200 



Total Anuraeopsis 



Bdelloida egg, attached 



1,600 



46,400 



23,036 



22,800 



48,000 



92,800 



44,800 



98,544 



236,336 



38,400 



68,800 



60,800 



22,400 



9,600 



20,800 



6,400 



4,800 



1,600 



32,000 



6,400 



168,288 



9,600 



6,400 ZZZZZ. 



112,192 ZZZZZ. 



105,792 



3,200 



158,688 



177,888 



