204 



University of Calif urnia I'liblications in Zoologij [Vol. 22 



1913 



10/ 4 

 10/11 

 10/18 

 10/26 

 11/ 1 

 11/ 8 

 11/15 

 11/22 



1 1 /30 

 12/ 6 



12 14 

 12/20 

 12/27 



Table 2. — Ohganisms Per Cubic Meter in Plankton of 

 San Joaquin River in 1913 — (Continued) 



Goinphonema 

 sp. 



105,792 

 105,792 



1.600 

 1,600 



Gyrosignia 

 acuminatum 



423,168 



12,800 

 6,400 



1,600 



Gyrosigma GyrosiRina Mastoieloia Melosira 



kiitzinffii Bcalpruides braunii granulata 



105,792 45,914,928 



10.5,792 73,8.52,864 



211,584 25,.")0.->.920 



12,4S:i,l5') 



12,800 12,0()7,.392 



10.5,792 4,I7,S,7S4 



1,4SI,0SS 



52,896 3.1)41,.520 



6,400 14,170,128 



1,600 2,142,288 



79,344 60,8,304 



3,200 846,336 



1,600 661,200 



Melosira 

 granulata A 



1913 (small) 



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 5,368,944 



4/ 5 1,600 



4/13 1,243,056 



4/19 290,928 



4/26 238,032 



5/ 3 52,896 



5/10 185,136 



5/17 



5/24 211,584 



5/31 634,752 



6/ 7 



6/16 



6/21 



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 ■ 



Melosira 

 varians 



52,896 



4,800 



39,672 



79,344 



79,344 



44,800 



185,136 



105,792 



158,688 



105,792 



449,616 



264,480 



290,928 



343,824 



18.5,136 



528,960 



581,856 



502,512 



634,752 



1,163,712 



634,752 



1,216,608 



793,440 



317,376 



238,032 



449,616 



132,240 



238,032 



105,792 



1.5.8,11,88 



l.J.S,6S8 



1.58,688 



12,800 



105,792 



211,584 

 105,792 

 105,792 



211,584 



Navicula 

 affints 



19,836 



Navicula 

 alpestris 



Xavicula 

 bacillum 



1,600 

 1,600 

 105,792 

 6,400 

 1,600 



3,200 

 52,896 

 52,896 



3,200 

 79,344 



264,480 



79,344 



105,792 



52,896 



52,896 



1,600 



79,344 



79,344 



79,344 



18,5,136 



3,200 



264,480 



899,232 



317,-376 



317,.376 



3,200 



3,200 



52,896 



52,896 



3'2b6 



3,200 

 264,480 



317,376 



12,800 



105,792 



'211,584 



238,032 



18.5,1.36 



185,136 



343,,824 



793,440 



634,7.52 



1,005,024 



1,322,400 



,581,856 



211,.584 



79,344 



79,344 



52,896 



105,792 



105,792 

 105,792 

 158,688 



105,792 

 317,376 

 740,.544 

 211,584 

 105,792 

 105,792 

 211,.584 

 211.584 

 317,376 



Navicula 

 didyma 



3,200 



3,200 



52,896 

 52,896 



1,600 

 1,600 



3,200 



3i260 

 211,584 



