1920] 



Allen: Plamkton of the San Joaquin River 



253 



Table 3. — Organisms Per Cubic Meter in Plankton of 

 Smith's Canal in 1913 — (Continued) 



Total Protozoa 

 Total without 



' 1913 Suctoria Mastigophora 



7/ 5 955,328 



7/12 1,569,432 



7/19 1,229,408 



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 



1/11 



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 38,400 



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 



28,800 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 



6,400 3,200 



52,896 6,400 



'Z^ZZ-'. 6,400 



6,400 



Collotheca 

 pelagica 



Collotheca 

 sp. 



19,200 



12,800 



51,200 

 51,200 



12,800 



64^000 



105,792 



12,800 



52,896 



3,200 



3,200 



Total 

 Bdelloida 



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 



112,192 



105,792 



3,200 



158,688 

 177,888 



211,584 

 153,600 



Anuraeopsis 

 egg, attached 



