4 
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 lterature, especially among the alge, 
DISTRIBUTION OF COLLECTIONS BY MONTHs. 







| 94. | "05, 06, OF. 08. 99, 
Ro RSC ON alate siren on: | is Heater 3 5 
TR: ate a te Nea RS ik eee ee Lee) 4 | 2 4 4 
10 CL eae a Le rere ered Or Le Te Rey | 5 1 5 4 
TB Scx op Seg te eae nee wots ell ade As | 2 | A 1 4 
tics Gites thane eee Rhee ee ae | 4 1 5 
Wale recs = ete ators cath 2 1 5 1 4 
VII p 4 5 3 4 
WELTs. 1 5 6 4 5 
1G, Cae ae tee ee | 2 4 2 4 4 
NE ne ge oe | 1 5 1 4 4 
ROTC Ry tera aon at Pig 1 4A) 1 5 5 
DIO ITE § a easy e ee ce 1 ye al 2 4 5 
Total 10 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. 
