THE 
HEW PHYTOIiOGIST. 
Vol. XIV, Nos. 2 & 3. Feb. & Mar., 1915. 
[Published March 31st, 1915.] 
NEW MARINE FUNGI ON PELVETIA. 
By Geo. K. Sutherland. 
[With Four Figures in the Text]. 
HE small number of known marine fungi stands in striking 
contrast to the long list of land species, especially when the 
extent and the variety of possible algal hosts are considered. A 
natural inference that such forms would be mainly simple Phyco- 
mycetes, like the Chytridineae occurring on fresh-water algae, has 
led to a search for these, but, owing to their minute size and to the 
difficulty of observing them under anything like natural conditions, 
the investigations have proved distinctly disappointing, both in point 
of species recorded and the knowledge of their life-histories. Little 
systematic attention has been paid to other groups, with the result 
that, while one or two species were known as early as the middle 
of last century, the additions have been few and accidental. In a 
survey of marine Pyrenomycetes, published in 1907, Cotton gives a 
list of nine known species, one of which he describes for the first 
time. Of these, only two are recorded for this country. Several 
new and interesting fungi have been collected by the writer in a 
careful examination of algae at various points along the coast of 
Britain. In the present paper it is proposed to deal only with some 
of those occurring on Pelvetia. 
The dark olive-green, lichen-like zone of Pelvetia canaliculata 
is one of the most characteristic and distinctive features of our 
seaboard, forming a narrow belt near the upper reaches of the 
tidal, and along those outer rocks which project into comparatively 
shallow water at high tide. The densely crowded much-branched 
thalli, attached to the rock surface by more or less discoid holdfasts, 
mark the upper limit of the Fucaceae. There they lead a dual 
existence, at one time swaying freely with the advancing and 
retreating waters, at another exposed to the full influence of sun 
