276 



University of California Publications in Zoology 



[Vol. 



Table 5. — Plankton Organisms Per Cubic Meter in Smith's Canal, 

 Hourly Series in 1913 — (Continued) 



I A.M. 



8 a.m. 



9 A.M. 



10 A.M. 



11 A.M. 



12 M. 



1 P.M. 



2 P.M. 



3 P.M. 



4 P.M. 



5 P.M. 



5:48 p. 

 6:40 p. 



1913 

 9/11 



7 A.M. 



8 A.M. 



9 A.M. 



10 A.M. 



11 A.M. 



12 M. 



1 P.M. 



2 P.M. 



3 P.M. 



4 P.M. 



5 P.M. 



5:48 p. 

 6:40p 



1913 



Scenedesmus 

 quadricauda 



158,688 

 264,480 

 105,792 

 211,584 

 264,480 

 158,688 

 264,480 

 449,616 

 449,616 

 396,720 

 555,408 

 :. 588,408 

 :. 925,680 



7 A.M. 



8 A.M. 



9 A.M. 



10 A.M. 



11 A.M. 



12 M. 



1 P.M. 



2 P.M. 



3 P.M. 



4 P.M. 



5 P.M. 



5:48 p.m. 

 6:40 p.m. 



1913 



8/11 



7 A.M. 



8 A.M. 



9 A.M. 



10 A.M. 



11 A.M. 



12 m. 



1 P.M. 



2 P.M. 



3 P.M. 



4 P.M. 



5 P.M. 



5:48 p.m. 

 6:40 p.m. 



Cyclotella 

 kiitzingii 



1,428,192 



1,005,024 



1,322,400 



1,666,224 



1,269,504 



819,888 



1,719,120 



1. 983.600 



2,195,184 



2,036,496 



2,539,008 



m. 1,877,808 



m. 1,428,192 



Fragillaria 

 capucina 



6,400 



52,896 

 6,400 



52,896 



52,896 

 52,896 



6,400 

 6,400 



105,792 



105,792 



Cyclotella 

 operculata 



3,808,572 

 4,311,024 

 4,178,784 

 :;.4iii.iiss 

 2,750,592 

 2,697,696 

 3,623,376 

 4,178,784 

 2,856,384 

 3,702,720 

 4,072,992 

 4,072,992 

 5,395,392 



Total 

 Chlorophyceae 



673,392 

 1,467,440 



661,200 

 1,031,472 

 1,295,952 



997,776 

 1,751,968 

 2,194,336 

 2,147,S40 

 1,910,656 

 2,578,256 

 2,696,848 

 2,743,334 



Cymbella 



52,896 



52,896 



52,896 

 105,792 



Asterionella 

 gracillima 



52,896 

 52,896 



.v.'. sue, 



6,400 



52,896 



158,688 

 264,480 

 502,512 

 502,512 

 502,512 

 211,584 

 343,824 

 211,584 

 211,584 

 105,792 

 52,896 

 158,688 

 264,480 



52,896 



6,400 

 12,800 



paradoxa 

 264,480 

 211,584 

 158,688 

 211,584 

 60,800 

 343,824 

 211,584 

 396,720 

 449,616 

 343,824 

 158,688 

 343,824 

 158,688 



52,896 

 ' 6,400 



52,896 



