+ 
prepared at Berkeley, being completed in May, 1904, after my 
connection with the University of California was begun. My 
separation from the collections and the library of the State Labora- 
tory has rendered impossible some verifications, comparisons of 
specimens with more recent literature, especially among the alge, 
DISTRIBUTION OF COLLECTIONS BY MONTHS. 
04. 95. 06. LO ee 08. 99, 
ere : | | 
I NSichese oNgten Iota aes medic Ae il Rare | 3 5 
1 WR Oi cance eat esa) on EOP cm Nocera sc 1 4 | 2B 4 4 
1D Ween eae eee pecs lareeas coke [hoc cece 5 1 5 4 
TEN eee 9) can Sie ce, ee ees eed ee eer 2 4 1 4 
Vhs Marae clad Sopa Bae coc) oem ccel fA beens Gio Pelee bntceae 4 1 5 
WAGs snceye ecu eeotaeh eee Z 1 5 1 + 
VII 2 4 5 3 4 
WAMLIEICS 1 5 6 4 5 
DNase sic aks, cee Ree 2 4 2 4 } 
SER ities is casaheaencreteree 1 5 1 4 4 
RT ete cc hints: oh ane erase 1 4 1 5 5 
CCTM Ai hove tes mR ese 1 5 2 + 5 
Total.........-.| UO) 31 43 30 52 13 
some desirable amplifications from omitted intermediate collec- 
tions, and the elimination of a few minor errors in the statistics. 
It should be understood that the data of this paper are derived 
from channel collections, and the conclusions apply only to that 
region. Conditions of plankton development in the adjacent back- 
waters, as shown in Part I. differ greatly in volumetric character 
and seasonal distribution. The composition of the plankton and 
the seasonal distribution of its constituent organisms also exhibit 
there many points of difference from those here described for channel 
waters. 
