1920] 



Allen: Plmikton of the San Joaquin River 



203 



1913 



9/ 6 



9/13 



9/20 



9/27 



10/ 4 



10/11 



10/18 



10/26 



11/ 1 

 11/ 8 

 11/15 

 11/22 

 11/30 

 12/ 6 

 12/14 

 12/20 

 12/27 



Table 2. — Organisms Per Cubic Meter in Plankton op 

 San Joaquin River in 1913 — {Continued) 



Epithemia 

 ocellata 



25,600 



12,800 



12,800 

 6,400 



3,200 



9,600 

 52,896 



Eunotia 

 sp. 



12,800 

 12,800 



Fragillaria 

 capucina 



105,792 

 105,792 



25,600 



1,600 



12,800 

 6,400 

 6,400 



12,800 

 1,600 

 3,200 

 3,200 



6,400 



Fragillaria 

 crotonensis 



105,792 



52,896 

 9,600 



Fragillaria Gomphonema 

 sp. constrictum 



1,600 



Gomphonema 



1913 sp. 



1/ 5 



1/12 



1/19 



1/25 400 



2/ 2 



2/ 8 



2/15 



2/23 



3/ 1 



3/ 8 



3/15 



3/23 



3/29 1,600 



4/ 5 



4/13 1,600 



4/19 105,792 



4/26 



6/ 3 



6/10 



5/17 



5/24 



5/31 



6/ 7 



6/16 



6/21 



6/28 1,600 



7/ 5 



7/12 



7/19 



7/26 



8/ 2 



8/ 9 (5,400 



8/15 



8/23 



8/31 



9/ 6 



9/13 



9/20 



9/27 



Gyrosigma 

 acuminatum 



79,344 



3,200 



105,792 



1,600 

 3,200 



105,792 

 423,168 



105,792 

 25,600 



Gyrosigma 

 kiitzingii 



2,000 



1,200 



13,224 



6,400 



52,896 



6,400 



6,400 



3,200 



3,200 



79,344 



79,344 



132,240 



79,344 



25,600 



158,688 



4,800 



158,688 



79,344 



211,584 



158,688 



83,200 



38,400 



211,584 



12,800 



12,800 



132,240 



105,792 



19,200 



264,480 



264,480 



264,480 



317,376 



370,272 



423,168 



423,168 



317,376 



105,792 



25,600 



Gyrosigma 

 scalproides 



13,224 

 1,600 

 1,600 



52,896 



52,896 

 3,200 



1,600 



52,896 



105,792 



3,200 



3,200 



12,800 

 476,064 

 846,336 



Mastogloia Melosira 



braunii granulata 



26,448 



19,836 



30,060 



85,956 



608,304 



502,512 



634,752 



1,428,192 



343,824 



925,680 



3,438,240 



6,400 1,877,808 



3,200 1,. 533,984 



396,720 



3,808,512 



7,696,368 



6,056,592 



1,243,056 



1,.586,880 



3,491,136 



2,274,528 



4,866,432 



4,654,848 



3,279,5.52 



8,198,880 



19,016,112 



11,372,640 



19,994,688 



27,294,336 



26,871,168 



65,273,664 



61,465,152 



74,636,2.56 



169,478,784 



141,443,904 



180,057,984 



101,242,944 



98,809,728 



55,646,592 



