1920] 



Allen: Plankton of the San Joaquin River 



201 



1813 



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 



Asterionella 

 gracilliraa 



4,866,432 

 608,304 



2. — Organisms Per Cubic Meter in Plankto"n of 

 San Joaquin River in 1913 — (Continued) 



Asterionella 



52,896 



6,400 



105,792 



1,600 



9,600 



4,443,264 



449,616 



476,064 



79,344 



gracillima 

 (large) 



2,962,176 

 52,896 

 79,344 



3,200 

 3,200 



12,800 



12,S00 



211,584 



52,896 



290,928 

 79,344 



Bacillaria 



105,792 



1,600 



79,344 



396,720 



1,248,848 



8,569,152 



3,702,720 



21,528,672 



15,392,736 



4.76(1,640 



2,062,944 



4,972,224 



mi;,:;:;i; 



4,453,264 



3,067,968 



1,692,672 



1,481,088 



52S,960 



317,376 



76,800 



15S,688 



105,792 



19,200 



290,928 



1,322,400 



2,909,280 



2,195,184 



555,408 



1,216,608 



Cocconeis 

 pediculus 



1,600 



rj, si id 



3,200 



1,600 

 1,600 



Cyclotella 

 spp. 



396.720 



423,168 



1,269,504 



5,130,912 



10,050,240 



10,261.824 



3,596,928 



3,332,448 



9,045,216 



14,176,128 



14,176,128 



14,493,504 



15,sos,s00 



11,954,496 



17,783,116 



49,300,272 



42,750,016 



31,218,700 



8,569,152 



3,702,720 



3,279,552 



1,533,984 



1,246,056 



795,040 



1,216,608 



1,904,256 



1,190,160 



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 



Cymatople 



400 

 1,600 



6,400 

 3,200 

 3,200 



3,200 



6,400 

 3,200 

 19,200 

 12,800 

 12,800 

 132,240 

 44.800 

 32,000 

 76,800 

 51,200 

 19,200 

 19,200 

 12.S00 



9,600 



12,800 



1,600 



3,200 



1,600 



79,344 



158,688 



79,344 



79,344 



105,792 



185,136 



238,032 



211,584 



211,584 



899,232 



528,960 



211,584 



105,792 



79,344 



6,400 



Cymbella 

 cymbiformis 



800 

 400 



800 

 6,400 



6J400 



3,200 

 3,200 



6,400 



3,200 

 9,600 

 3,200 



12,800 



3,200 



19,200 

 12,800 

 12,800 

 12,800 

 25,600 

 158,688 

 16,000 

 3,200 



3,200 



Cymbella 



400 



26,448 



79,344 



3,200 



6,400 



52,896 



1,600 



3,200 

 6,400 



3,200 

 3,200 

 79,344 



400 



1,600 

 6,400 

 3,200 

 1,600 

 1,600 



1,600 



52,896 

 1,600 



