Some Marine Algae from Canton Atoll- 
'ey 
E. Yale Dawson 
The following annotated list has resulted from an examination of a 
collection of algae made during the first part of February, 1958, by Dr. 
and Mrs. Otto Degener on Canton Atoll in the Phoenix group. Only the 
green. Drown, and red algae are treated here, inasmuch as a rather large 
series of Cyanophyta has been identified by Dr. Francis Drouet and is ac¬ 
counted in Bulletin No. 64. 
With the exception of about a dozen snecies mentioned by Degener & 
Gillaspy ( 1955 ) on the basis of determinations by M, S. Doty, this is the 
xirso floristic list of which I am aware of the marine vegetation of 
Canton Atoll, or of any island in the Phoenix group. Accordingly, these 
•records supplement and extend our knowledge of central -Pacific atoll 
iioras derived from such reports as have appeared in recent years for the 
Marshall, Gilbert, and Line Islands(cf. Taylor 1950, Dawson, Aleem & 
Halstead 1955 , Dawson 1956 , 1957, Moul 1957). 
The specimens are cited according to Degener collection numbers. 
The first set of specimens, all of which are liquid preserved, has been 
deposited in the Herbarium of the University of California, Berkeley. 
CHL0H0PHYTA 
Enteromorpha clathrata (Roth) J. Ag. 24841. 
Enteromorpha sp. 24863. This appears to agree with what Chapman 
has called E. clathrata var. pumila (Aresch.) Chapm. from New 
Zealand. 
Enteromorpha kylinli Bliding 24763; 24764; 24739; 24849? 
Ulvella lens Crouan 24843a, growing on Caulerpa serrulata . 
Cladophora fascicularis (Mert) Kutz. 24717. This material, about 
1 -f cm. tall, is in good agreement with Borgesen's illustrations 
of specimens both from Mauritius and the West Indies. The 
specimens are much smaller in height than many West Indian ones, 
but agree in cell size and form. 
Cladophora flexuosa (Griffiths) Karv, 24852. The specimens show 
such close accord in size, habit, branching and cell form with 
this tropical Atlantic species as to be referable here with 
reasonable certainty. The similarity to Vicker f s illustration 
of the species from Barbados is especially striking. The plant 
is reported from Australia, but apparently not from the central 
Pacific. 
Contribution from the Beaudette Foundation for Biological Research 
Solvan. 
Camxomia. 
