212 



University of California Publications in Zooloyij [Vol.22 



Table 2. — Organisms Per Cubic Meter in Plankton of 

 San JoAijuiN River in 1913 — (Colinued) 



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 



Platydorina 

 caudata 



6,400 

 19,200 

 38,400 

 12,800 

 12,800 

 12,800 



"ei^boo 



12,800 



6,400 



Ploodorina 

 californica 



3,200 

 12,800 



15S,(iS8 



l.")S,()S,S 



ll).").7<)2 



l.'jS.liSS 



105,702 



211,584 



89,600 



51,200 



12,800 



"l2,800 



12,800 

 6,400 



Pleodorirm 

 ilUnoisensib 



6,400 



6,400 



Ptoronionas Trachelonionas Trachelomonas 

 6p. euchlura volKcnsU 



158,688 



105,792 



105,792 

 105,792 



105,792 



1,600 1,600 

 105,792 



1,600 



Trachelomonas 

 volvocina 



Volvox 

 aureus 



1/ 5 

 1/12 

 1/19 

 1/25 

 ?/ 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 

 '/ 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 



105792 



.52,806 



105,792 



1,600 

 105,792 



317,376 



317,376 



105,792 



.'■2,896 



52,896 



1,600 



3,200 



211,584 



25,600 



Total 

 Mastigophora 



400 



2,800 



2,264,104 



927,280 



1,622,480 



3,000,970 



3,028,528 



2,592,656 



770,944 



217,1.36 



270,880 



793,440 



1,699,072 



166,688 



372.624 



107,392 



177,888 



266,080 



211, ,584 



131,392 



112,192 



1,005,024 



1 ,028.888 



564,160 



28;f,.-iS| 



62,496 



714.096 



1,14.5,264 



5,985,1.52 



7807,712 



.\moeba 

 proteus 



Amoeba 

 radiosa 



.\rcella 

 vulgaris 



3,200 

 3,200 



52,896 

 "'3,200 



1,600 

 3,200 



12,800 

 "3,266 



