1920] 



Allen: Plankton of the San Joaquin River 



281 



Table 5. — Plankton Oroanisms Per Cubic Meter in Smith's Canal, 

 Hourly Series in 1913 — (Concluded) 



1913 Synchaeta 



8/11 ap. 



7 A.M 



8 A.M. 52,896 



9 A.M. 52,896 



10 A.M 



11 A.M. 52,896 



12 M. 6,400 



1 P.M 



2 P.M. 6,400 



3 P.M. 6,400 



4 P.M 



5 P.M 



5:48 p.m. 158,688 

 6:40 P.M 



Trichocerca 

 capucina 



52,896 

 12,800 



52,896 



Trichocerca 

 iernis 



158,688 

 1.58,688 

 34:j,824 

 264,480 

 714,096 

 766,992 

 343,824 

 211,584 

 211,584 

 32,000 

 25,600 

 211,584 

 264,480 



Total 

 Ploima 



4,564,560 

 7,466,640 

 4.846,384 

 7,199,408 

 5,759,920 

 9,612,576 

 4,979,936 

 4,817,607 

 3,575,840 

 2,721,600 

 3,512,752 

 5,471,152 

 6,199,188 



Total 

 Rotifera 



4,729,648 

 7,615,328 

 5,196,608 

 7,410,992 

 6,268,832 

 9,956,400 

 5,145,024 

 5,180,631 

 3,704,432 

 2,852,992 

 3,631,344 

 5,708,336 

 7,357,876 



Bosmina 

 longirostris 



52,896 

 52,896 



52,896 



6,400 

 6,400 



6,400 



1913 

 8/11 



7 A.M. 



8 A.M. 



9 A.M. 



10 A.M. 



11 A.M. 



12 M. 



1 P.M. 



2 P.M. 



3 P.M. 



4 P.M. 



5 P.M. 



5:48 P, 

 6:40 p. 



Sid a 



52,896 

 12,800 

 12,800 

 25,600 

 6,40) 

 19,200 



19,200 

 52,896 

 52,896 



6,400 

 12,800 



Total 

 Cladocera 



105,792 



12,800 



65,696 



25,600 



6,400 



19,200 



52,896 



19,200 



52,896 



52,896 



6,400 



6,400 



19,200 



Cyclops 

 1.58,688 

 86,400 

 86,400 

 54,400 

 73,600 

 54,400 

 25,600 

 80,000 

 60,800 

 60,800 

 99,200 

 99,200 

 140,800 



Nauplius 



158,688 



158,688 



105,792 



1.58,688 



80,000 



211, .584 



86,400 



92,801) 



12,800 



52,896 



105,792 



52,896 



105,792 



Total 

 Copepoda 



317,376 

 245,088 

 192,192 

 213,088 

 153,(jOO 

 265,984 

 112,000 

 172,800 

 73,600 

 113,696 

 204,992 

 152,096 

 246,592 



Total 

 Entomostraca 



423,168 



257,888 

 257,888 

 238,688 

 160,000 

 28.5,184 

 164,896 

 192,000 

 126,496 

 172,992 

 211,.584 

 1.58,496 

 265,792 



Total 

 Organisms 



42,893,610 

 37,825,610 

 .32,689,892 

 38,192,880 

 34,967,488 

 41,414,7.52 

 38,087,1.52 

 51,429,463 

 54,374,720 

 56,092,520 

 72,902,032 

 69,619,120 

 S5,.53 1,500 



