1920] 



Allen: Plankton of the San Joaquin River 



193 



Table 1. — Organisms Per Cubic Meter ix Plankton or 

 Stockton Channel in 1913 — {Continued) 



Cyclops Diaptomus Nauplius Total 



1913 sp. sp. sp. Copepoda 



4/16 6,400 12,800 25,600 44,800 



4/19 38,400 52,896 79,344 170,640 



4/23 22,400 6,400 1.32,240 161,040 



-4/26 41,600 22,400 185,136 249,136 



4/30 38,400 44,800 79,344 162,544 



5/ 3 80,000 6,400 132,240 218,640 



5/ 7 73,600 185,136 258,736 



5/11 51,200 423,168 474,368 



5/14 57,600 1,005.024 1,062,624 



5/17 211,584 264,480 475,964 



5/21 57,600 634,752 692,3.^^2 



5/24 249,600 1,163,712 1,413,312 



5/27 192,000 952,128 1,144,128 



5/31 460,800 899,232 1,360,032 



6/ 3 317,376 899,232 1,216,608 



6/ 7 147,200 872,784 1,019,984 



6/11 264,480 1,375,296 1,6.39,776 



6/16 115,200 211,584 326,784 



6/18 179,200 317,376 496,.576 



6/21 76.800 846,336 923,136 



6/25 317,376 528,960 846,436 



6/28 264,480 476,064 740,.544 



7/ 3 179,200 423,168 602,.368 



7/ 5 268,800 1,057,920 1,326,720 



7/ 9 370,272 1,163,712 1,-533,984 



7/12 740,544 846,.336 1,. 586,880 



7/16 454,400 793,440 1,247,840 



7/19 6,87,648 740,.544 1,428,192 



7/23 264,480 1,110,816 1,375,296 



7/26 264,480 687,648 9.52,128 



7/30 317,376 740,.544 1,0.57,920 



8/ 2 581,856 1,322,400 1,904,2.56 



8/ 6 264,480 1,269,504 1,.533,984 



8/ 9 317,376 25,600 1,005,024 1,348,000 



8/13 1,005,024 1,692,672 2,697,696 



8/15 476,064 1,110,816 1,. 586,880 



8/20 740,544 846,336 1,.5.S6,880 



8/23 476,064 846,336 1,322,400 



8/27 634,7.52 1,216,608 1,851,360 



8/31 317,376 793,440 1,110,816 



9/ 2 793,440 1,.586,S80 2,380,320 



9/ 6 264,480 : 1,269,504 1,533,984 



9/ 9 581,856 1,.322,400 1,904,256 



9/13 476,064 1,005,024 1,481,088 



9/17 370,272 1,110,816 1,481,088 



9/20 370,272 370,272 740,544 



9/24 224,000 952,128 1,176,128 



9/27 317,376 687,648 1,005,024 



10/ 1 211,.5S4 264,480 476,064 



10/ 4 211,.584 211,584 423,168 



10/ S 1.34,400 .528,960 663,360 



10/11 158,688 105,792 264,480 



10/15 121,600 264,480 386,080 



10/18 64,000 158,688 222,688 



10/22 38,400 105,792 144,192 



10/26 1.58,688 105,792 264,480 



10/29 76,800 ..; 1.58,688 235,488 



11/ 1 29,600 211,.5S4 211, .584 



11/ 5 400 6,400 6,400 



11/ 8 12,800 12,800 



11/12 3,200 19,200 22,400 



Total 

 Entomostraca 



Glochidia 



44,800 



170,640 



161,040 



249,136 



162,544 



218,640 



258,736 



474,368 



1,062,624 



479,164 



692,352 



1,419,712 



1,144,128 



1,360,032 



1,223,008 



1,026,.384 



1,646,176 



326,784 



496,.576 



929,.536 



852,836 



740,544 



602,368 



1,333,120 



1,533,984 



1,593,280 



1,247,-840 



1,440,992 • 6,400 



1,375,296 



9.58,.528 



1,064,320 3,200 



1,917,0.56 



1,.533,984 



1,354,400 



2,697,696 



1,586,880 



1,590,080 3,200 



1,.341,600 



1,8.57,760 



1,117,216 



2,40.5,920 



1,533,9,84 



1,917,0.56 



1,481,088 



1,. 500,288 



740,.544 



1,195,328 



1,017,824 



601,056 



435,968 



676,160 



264,480 



386,080 



229,088 



150,592 



264,480 



235,488 



211, .584 



6,400 



12,800 



22,400 



