1920] Allen: Plankton of the San Joaquin River 137 



Table 1. — Organisms Per Cubic Meter in Plankton of 

 Stockton Channel in 1913 — {Continued) 



Cyclotella Cymatopleura Cymbella Cymbella Cymbella Cymbella 



1913 spp. solea affinis cymbiformis parva sp. 



2/12 740,544 1,600 



2/15 1,150,488 800 



2/19 1,401,744 1,600 



2/23 886,008 



2/26 3,570,480 3,200 



3/ 1 5,210,256 



3/ 5 5,659,872 3,200 



3/ 8 1,613,328 1,600 3,200 



3/12 2,697,696 



3/15 1,110,816 



3/19 2,168,736 



3/23 2,724,144 3,200 1,600 



3/26 1,163,712 



3/29 925,680 



4/ 2 925,680 3,200 



4/ 5 2,459,664 1,600 



4/9 6,162,384 



4/13 3,570,480 3,200 



4/16 9,151,008 



4/19 10,684,992 > 



4/23 15,472,080 



4/26 15,286,944 



4/30 18,116,880 



5/ 3 20,391,408 3,200 



5/ 7 19,597,968 



5/11 32,610,384 1,600 



5/14 60,248,544 



5/17 , 43,216,032 



5/21 36,022,176 



5/24 35,704,800 



5/27 54,482,880 



5/31 53,001,792 . 3,200 



6/ 3 57,286,368 



6/ 7 60,195,648 



6/11 59,349,312 105,792 3,200 



6/16 38,508,288 3,200 



6/18 42,475,488 



6/21 34,646,880 



6/25 36,974,304 



6/28 51,362,016 6,400 



7/3 35,175,840 



7/5 14,281,920 



7/ 9 12.324,768 



7/12 16,768,032 



7/16 45,755,040 



7/19 24,279,264 



7/23 11,742,912 6,400 



7/26 17,349,888 3,200 



7/30 15,168,800 



8/2 14,916,672 



8/ 6 9,838,656 



8/ 9 10,790,784 :... 



8/13 14,229,024 



8/15 6,770,688 



8/20 12,113,184 : 



8/23 14,440,608 



8/27 20,047,584 



8/31 21,898,944 



9/2 12,166,080 



9/6 12,166,080 



