1920] 



Alien: Plankton of the San Joaquin River 



259 



Table 3. — Organisms Per Cubic Meter in Plankton of 

 Smith's Canal in '1913 — {Continued) 



1913 



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 



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 



Trichocerca 

 capucina 



Trichocerca 

 iernis 



6,400 

 3,200 



9,600 

 3,200 

 3,200 



6,400 

 6,400 



12,800 



12,800 



6,400 



16,000 



79,344 



185,136 



3,200 



19,200 

 32,000 



211^584 

 211,584 



38.400 

 211,584 



51,200 

 740,544 

 423,168 

 105,792 



12,800 

 6,400 



Total 

 Ploima 



841,344 



324,800 



200,944 



737,424 



696,304 



1,(1!)H,792 



1,025,728 



466,368 



441,520 



958,336 



432,576 



1,011,136 



179,200 



506,080 



204,144 



2,377,584 



179,392 



83,200 



434,176 



1,540,288 



1,022,432 



4.896,784 



959,840 



544,384 



1,466,400 



1,398,816 



219,488 



1,604,384 



4,086,720 



1,047,744 



2,412,096 



916,352 



2,727,626 



2,269,450 



2,217,472 



3,000,576 



4,725,248 



7,006,176 



1,565,984 



515,312 



1,091,520 



209,888 



420,720 



389,472 



44,800 



197,936 



Total 

 Rotifera 



934,144 



369,600 



299,488 



976,961) 



734,704 



1,762,592 



1,086,528 



488,768 



451,120 



979,136 



438,976 



1,015,936 



180,800 



538,080 



210,.544 



2,545,872 



188,992 



83,200 



440,576 



1,540,288 



1,134,624 



5,002,576 



963,040 



703,072 



1,644,288 



1,475,616 



219,488 



1,899,178 



4.125,120 



1,1. 53,. 536 



2,726,080 



1,230,336 



2,817,226 



2,625,226 



2,845,440 



3,102,976 



4,956,032 



7,078,272 



1,697,376 



.534,512 



1,110,720 



216,288 



423,920 



392,672 



44,800 



197,936 



Bosmina 

 longirostris 



:^,200 



6,400 



3,200 

 4,800 



6,400 



6,400 



12,800 



32,000 



"12^800 

 38,400 

 38,400 

 51,200 

 12,800 

 12,800 

 25,600 



Chydorus 

 sp. 



12,800 



52,896 



9,600 



'"3,200 



Sida 

 1913 sp. 



1/11 



1/19 



1/25 



2/ 2 



2/ 8 



2/15 



2/23 • 



3/ 1 



3/ 8 



3/15 



Total Canthocaniptus Cyclops 



Cladocera sp. sp. 



800 



3,200 



3,200 



1,600 



3,200 

 3,200 



Nauplius 

 sp. 



1,600 



3,200 

 6,400 

 3,200 



3,200 



Total 

 Copepoda 



3^200 



3,200 

 9,600 

 6,400 

 3,200 

 3,200 



3,200 



