178 TRANSACTIONS OF THE [Sess. LXXv. 
tice of the Pheophycee or Brown Alge. Hansgirg’s 
description and sketch enabled me to identify the Alga I 
had found as an epiphyte on aquatic phanerogams in the 
Elf Loch, especially as it was easily distinguishable from 
all the other freshwater Algz by its brown chroma- 
tophore. Professor G. 8. West of Birmingham, to whom 
I sent some living specimens of Phzeothamnion, confirmed 
my identification. He had already pointed out in 1904 (1) 
that this Alga would be found one of these days in Great 
Britain, and, as nearly all freshwater algae are cosmopolitan, 
it is not surprising that it should be discovered in this 
country also. As far as I can ascertain, it was recorded 
after 1886, the date of Hansgirg’s publication, from the 
following localities : — 
1888. G. Lagerheim (5): Sphagnum near Halensee, and 
on Cladophora from Tempelhof, both places near Berlin ; 
on Vaucheria in the Botanical Gardens of Wiirzburg, 
Bavaria, and also from Freiburg in the grand-duchy of 
Baden. 
1892. Borzi (6) in Sicily, near Messina. 
1892. A. Hansgirg (4), in the second volume of his “ Alga- 
flora of Bohemia.” 
I could not find any other record of Pheeothamnion except 
one in 1905, published again by A. Hansirg in his “ Alga- 
flora of Lower Austria” (7). The only other investigation 
regarding the life-history of Phaothamnion confervicolum, 
besides that given by G. Lagerheim in 1884 (2), was pub- 
lished by Borzi of Italy in 1892 (6). There are several 
important points in which Borzi differs from Lagerheim, 
such as the position of the zoospores and the presence of a 
red pigment spot. Lagerheim reports bi-ciliated asexual 
zoospores only, without a pigment spot, while Borzi has 
observed gametes and a red eye spot as is usually found 
in the zoospores of the higher forms of Algze. Lagerheim 
distinctly states that the two cilia of equal length are 
inserted in the anterior part of the zoospores, and Borzi 
describes the cilia to be directed laterally as observed among 
the Phxophycee. It would therefore be desirable to re- 
investigate the motile stages of Pheeothamnion, as the 
position of the cilia is of considerable importance for the 
systematist. 
