1920] Allen: Plankton of the San Joaquin River 175 



Table 1. — Organisms Per Cubic Meter in Plankton op 

 Stockton Channel in 1913 — (Continued) 



Total Protozoa Total Protozoa 



Total without with Collotheca Collotheca Total 



1913 Suctoria Mastigophora Mastigophora egg, attached pelagica Rhizota 



3/26 384,624 702,048 



3/29 286,032 768,400 



4/ 2 452,624 612,912 



4/ 5 424,672 439,072 



4/ 9 445.56S 459,968 



4/13 138,104 150,904 



4/16 390,472 826,440 



4/19 340,528 404,024 



4/23 442,272 1,662,080 



4/26 702,048 920,032 



4/30 1,005,776 1,141,216 



5/3 993,276 1,284,204 



5/ 7 769,344 822,240 



5/11 907,232 1,277,504 



5/14 1,854,560 1,966,752 



5/17 3,345,248 3,927,104 



5/21 2,280,928 2,502,112 



5/24 2,016,448 2,280,928 



5/27 2,125,440 2,657,600 



5/31 2.107,456 3,647,840 



6/ 3 2,962,176 3,709,120 



6/7 3,920,714 4,925,738 



6/11 3,074,368 4,185,184 



6/16 3,547,172 5,044,260 



6/18 2,915,6S0 4,419,168 



6/21 3,SS7,008 4,587,456 



6/25 4,306,576 5,753,968 



6/28 3,544,032 5,411,392 



7/ 3 2,601,504 5,542,784 



7/ 5 3,560,032 5,629,376 



7/ 9 1,804,864 4,821,440 



7/12 905,632 7,100,S64 



7/16 1,757,368 7,109,464 



7/19 1,434,592 8,476,160 



7/23 899,232 4,185,184 .......... 



7/26 2,125,440 10,324,320 



7/30 1,535,488 5,779,968 



8/ 2 3,547,232 8,379,968 



8/ 6 1,114,016 6,102,240 



8/9 2,277,728 5,190,208 



8/13 5,666,262 14,152,012 



8/15 3,398,144 10,178,432 6,400 6,400 



8/20 2,284,128 12,757,536 



8/23 2,987,776 11,880,704 . , 6,400 6,400 



8/27 1,235,808 9,755,264 



8/31 2,980,176 14,299,920 



9/ 2 1,430,992 16,634,544 12,S00 6,400 19,200 



9/ 6 3,200 1,705,472 18,529,600 



9/ 9 1,226,208 23,872,096 



9/13 1,248,608 22,883,072 



9/17 1,289,688 22,502,200 



9/20 1,328,192 10,902,368 



9/24 1,434,592 8,899,328 



9/27 1,163,712 15,S68,800 



10/ 1 2,168,736 14,546,400 



10/4 1,440,992 8,071,192 



10/ 8 1,394,496 7,854,208 6,400 6,400 



10/11 1,804,S64 8,740,640 



10/15 6,400 1,335,200 5,355,224 105,792 105,792 



