212 



University of California Publications in Zoology [Vol. 22 



Table 2. — Organisms Per Cubic Meter in Plankton of 

 San Joaquin River in 1913 — (Cotinued) 



1913 



6/28 

 7/ 5 

 7/12 

 7/19 

 7/26 

 8/ 2 

 8/ 9 

 8/15 

 8/23 

 8/31 

 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 



6,400 

 19,200 

 38,400 

 12,800 

 12,800 

 12,800 



64,000 



"l2,806 



6,400 



3,200 



12,800 



15s,(iss 



158,688 



105,792 



158,688 



105,792 



211,584 



sii.ciio 



51,200 



12,800 



12,800 



12,800 

 6,400 



6,400 



Trachelomonas 

 volgensis 



158,688 



105,792 



105,792 



105,792 



105,792 



1,600 1,600 

 105,792 



1,600 



1913 



1/ 5 

 1/12 

 1/19 

 1/25 

 2/ 2 

 2/ 8 

 2/15 

 2/23 

 3/ 1 

 3/ 8 

 3/15 

 3/23 

 3/29 

 4/ 5 

 4/13 

 4/19 

 4/26 

 5/ 3 

 5/10 

 5/17 

 5/24 

 5/31 

 6/ 7 

 6/16 

 6/21 

 6/28 

 7/ 5 

 7/12 

 7/19 

 7/26 



33,060 

 33,060 

 79,344 



1,600 

 79,344 

 52,896 



1,600 



132,240 



185,136 

 1,600 



105,792 

 52,896 

 105,792 



1,600 

 105,792 



317,376 



317,376 



105,792 



f2,896 



52,896 



1,600 



3,200 

 211,584 



Total 

 Mastigophora 



400 



2,800 



2,264,104 



927,280 



i,i;l>-_>.4.so 



3,000,976 



3,028,528 



2,592,656 



770,944 



217,136 



270,880 



793,440 



1,699,072 



166,6S8 



372,624 



107,392 



177,888 



266,080 



211,584 



131,392 



112,192 



1,005,024 



1,028,888 



564,160 



283,584 



62,496 



714,096 



1,145,264 



5,985,152 



7 807,712 



Amoeba 

 proteus 



3,200 

 3,200 



1,600 



3,200 



3,200 



12,800 



