1920] Allen: Plankton of the San Joaquin River 189 



Table 1. — Organisms Per Cubic Meter in Plankton op 

 Stockton Channel in 1913 — (Continued) 



Polvarthra rr^ i m ■ 



trigla egK, Synchaeta Triehocerca Trichocerca Total Total Floinia 



1913 attached male ' sp. capucina iernis Ploima without eggs 



1/ 5 199,960 114,004 



1/ g ■■■ 268,644 155,440 



1/12 142,544 102,544 



1/15 419,944 258,268 



1/19 221,984 130,028 



1/22 800 148,640 83,932 



1/26 530,960 301,540 



1/29 800 827,464 .567,996 



2/ 2 696,848 403,120 



2/ .5 ■ 807,840 364,836 



2/ 8 " " 1,667,024 900,032 



2/12 3,783,664 1,985,200 



2/1.5 96,848 60,000 



9/19 990,528 560,960 



2/23 1600 4,386,320 2,692,848 



2/26 3 200 4,058,896 2,107,392 



3/ 1 3.200 1,924.960 1,082,672 



3/5 6,400 11,674,672 5,722,272 



3/ 8 11,317,848 8,8.56,.5S4 



3/12 6,400 13,.336,096 9,.577,280 



3/15 6,400 2,468,480 1,898,112 



3/19 4,663,600 3,311,552 



3/23 • 3,.587,984 2,618,720 



3/26 9,600 4,062,448 2,390,672 



3/29 16,000 5,717,472 2,525,.5,52 



4/ 2 6,400 7,.860,608 4,898,432 



4/5 ■' 3,200 7,887,712 5,.398,400 



4/ 9 52,896 7,612,976 4,726,944 



4/13 6,182,992 3,075,776 



4/16 . 5,263,056 2,801,792 



4/19 .. , 9,310,7.52 6,526,912 



4/23 • 5,025,776 3,211,312 



4/26 1,600 9,573,136 6,017,904 



4/30 3.200 8,009,5,52 4,508.062 



5/ 3 6,400 6,757,440 3,-504,3.36 



5/7 52 896 ' 13,932,448 8,775,088 



5/11 1,600 13,163,008 9,936,.3.52 



5/14 8,064,960 6,701,408 



• 5/17 44,800 5,911,168 3,845,024 



5/21 ' ' 317 376 5.143,968 3,.504,192 



5/24 70.400 2,.5,56,128 1,180,832 



5/27 44sno ,, 12,800 2,786,620 1,786,492 



5/31 12,800 3,194.464 2,186,240 



6/ 3 317,376 7,483,936 4,3.59,.S72 



6/ 7 32,000 6,400 . 4,018,208 2,854,496 



6/11 2,.5.56,672 1,842,304 



6/16 3,200 3,464,960 1,466,400 



6/18 211,584 4,797,336 3,085,064 



6/21 317,376 7,916,704 4,835,936 



6/25 2,644,800 6,400 18,.537,.504 13,717,.568 



6/28 1,745,568 6,400 17.647,6,80 12,3.58,080 



7/ 3 32,000 ., . 6,400 4,125,.504 3,219,872 



7/5 .528,960 19,200 7,111,968 4,731,648 



7/9 12,800 211, .584 5,127,720 2,843,592 



7/12 3,200 317,376 8,578,0.56 5,979,7.52 



7/16 6,400 6,400 4.348,.576 3,026,176 



7/19 6,400 3,390,048 2,219,9.36 



7/23 6,400 3,428,2.56 2,208,448 



7/26 12,800 5,972.3.52 4,649,952 



7/30 19,200 4,2.55,7.84 3,.5.52,136 



8/ 2 19,200 3,639,032 2,683,704 



