1920] Allen: Plankton of the San Joaquin River 189 



Table 1. — Organisms Per Cubic Meter in Plankton of 

 Stockton Channel in 1913 — (Continued) 



Polyarthra 



trigla egg, Synchaeta Trichocerca Trichocerca Total Total Ploima 



1913 attached male sp. capueina iernis Ploima without eggs 



1/ 5 199,0(i0 114,004 



1/ S 208,044 155,410 



1/12 142,544 102,544 



1/15 410,044 258,268 



1/19 221,984 130,028 



1/22 800 lis, 040 83,932 



1/26 530,960 301,540 



1/29 800 827.404 507,990 



2 2 696.S4S 403,120 



2/5 ,807,840 304,836 



2/ 8 1,667,024 900,032 



2/12 3.7.83,664 1,985,200 



2/15 . 96,848 60,000 



2/19 990,528 500,960 



2/23 1,600 4,386,320 2,692,848 



2/26 3,200 ...... 4,058, S96 2,107,392 



3/ 1 3,200 1,924,900 1,082,672 



3/ 5 6,400 11,074,672 5,722,272 



3/ 8 11,317,848 8,856,584 



3/12 6,400 13,330,096 9,577,2,80 



3/15 6,400 2,40,8,480 1,898,112 



3/19 4,003,000 3,311,552 



3/23 3,587,984 2,018,720 



3/26 9,000 4,002,448 2,390,072 



3/29 10,000 5,717,472 2,525,552 



4/ 2 0,400 7,860,608 4,898,432 



4/ 5 3.200 7,887,712 5,398,400 



4/ 9 52,896 7,012,970 4,720,944 



4/13 0,182,992 3,075.776 



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



4/19 .. . 9,310.752 0.520,912 



4/23 5,025,770 3,211,312 



4 20 . .. 1,000 9,573,130 0,017,904 



4/30 3,200 ........... 8,009,552 4,508.062 



5/ 3 6,400 6,757,440 3,504,336 



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



5/11 1,600 13,103,008 9,930,352 



5/14 8,004,900 0,701, 40S 



5/17 44,800 5,911,168 3,845,024 



5/21 317,370 5.143,968 3,504,192 



5/24 70.400 2,556,128 1.180,832 



5/27 44,800 12.800 2,780,020 1,786,492 



5/31 12,800 3,194.404 2,186,240 



6/ 3 317,370 7,483,936 4,359,872 



6/ 7 32.0110 6,400 4,018,208 2,854,496 



6/11 2,556,672 1,842,304 



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



6/18 211,584 4,797,336 3,085,001 



6/21 317,370 7,910,704 4,835,936 



6/25 2, 014, soil 6,400 .. 18,537,504 13,717,568 



6/28 1,745,508 6,400 17,047,080 12,358,080 



7/ 3 32.000 6,400 4,125,504 3,219,872 



7/5 52,8.900 ... 19,200 7,111,968 4,731,648 



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



7/12 3,200 317,370 8,578,050 5,979,752 



7/16 0,400 0,400 4,348,576 3,026,176 



7/19 0,400 3.390,048 2,219,936 



7/23 6,400 3,428,256 2,208,448 



7/26 12,800 5,972,352 4,049,952 



7/30 19,200 4,255,784 3,552,136 



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



