A Guide to the Literature and Distributions of 
Pacific Benthic Algae from Alaska to the Galapagos Islands 
E. Yale Dawson 1 
Fifteen years ago the writer prepared the 
first "Guide to the marine algae of Pacific North 
America’’ (Dawson, \9A6a). That first check 
list of the benthic flora of the region has be- 
come outdated by the results of extensive ex- 
plorations of the Mexican coasts and islands 
from 1946 to 1952, and, subsequently, of the 
coasts of Central America and British Columbia. 
Doty’s "Marine algae of Oregon” (1947) ap- 
peared as the first treatment of that region, and 
a number of studies of California algae have 
added considerable literature for that area. The 
fuller knowledge of the Mexican and Central 
American algae has shown such affinities with 
the flora of the Galapagos Archipelago that it 
has seemed appropriate to include the entire 
northeast Pacific in the present list, from the 
southern boundary of Ecuador and the Gala- 
pagos Islands to the Aleutian Islands, and in- 
cluding Clipperton Island and the Revillagigedo 
Archipelago, but not extending as far west as 
Hawaii or the Line Islands, for which an in- 
dependent account is intended. 
As before, the literature cited represents the 
references that provide an adequate key to all 
previous literature dealing with the occurrence 
of a given species along the Pacific American 
coasts. Thus, some 80 titles have been added to 
bring this expanded list up to date, but one will 
find himself frequently referred to larger bib- 
liographies such as those of Smith ( 1944), Tay- 
lor (1945), Scagel ( 1957), Dawson (1954*), 
and others, for earlier or more exhaustive cita- 
tions of literature. 
For the sake of consistency, the distribution 
records are cited from north to south. 
The classification is essentially according to 
that of Papenfuss (1955). 
1 Beaudette Foundation for Biological Research, 
Solvang, California. Manuscript received May 16, 
1960. 
SYSTEMATIC LIST 
phylum CHLOROPHYCOPHYTA 
ORDER YOLVOCALES 
suborder VOLVOCINEAE 
FAM. POLYBLEPHARIDACEAE 
Stephanoptera gracilis (Artari) G. M. Smith 
Scagel, 1957 
Northern Wash, to Monterey, Calif. 
Dunaliella salina ( Dunal ) Teodoresco 
Scagel, 1957 
Northern Wash, to Monterey, Calif. 
fam. CHLAMYDOMONADACEAE 
Platymonas subcordiformis (Wille) Hazen 
Smith, 1944 
Monterey, Calif. 
suborder CHLORODENDRINEAE 
fam. CHLORANGIACEAE 
Collinsiella tuberculata Setchell & Gardner 
Scagel, 1957 
Southern British Columbia to Pacific Grove, 
Calif. 
Prasinocladus ascus Proskauer 
Proskauer, 1950 
Near Santa Cruz, Calif. 
Prasinocladus lubricus Kuckuck 
Proskauer, 1950; Scagel, 1957 
Friday Harbor, Wash., to Monterey, Calif. 
370 
