106 
NOTES ON VAUCHERIA. 
yet be discovered in Vaucheria. We failed, both Mr. Bates and 
myself, to detect any active zoogonidia, but we have both seen 
bodies of a definite form, resembling zoogonidia at rest, in the 
cells ; and in the water in which the gathering was kept were found 
similar bodies outside the threads, some in a state of germination, 
as shown on our plate. It must not be supposed that we affirm, 
or have direct evidence to affirm, either that zoogonidia are 
produced in the cells, or that the free germinating bodies are 
escaped zoogonidia, but these circumstances are mentioned as 
showing how necessary it is that Vaucheria should again become 
the subject of investigation, for the purpose of discovering, beyond 
doubt, what is the cause and true interpretation of this unsuspected 
septation of the filament. 
M. C. Cooke. 
Plate 161. Fig. 1. — Portion of filament of Vaucheria bearing 
oogonia and antheridium. 
Figs. 2, 3, 4. — Portions of filaments divided into cells by 
transverse septa, the contents accumulated, and 
undergoing differentiation at a, a. 
Figs. 5-6. — Cells from the water in which the Vaucheria 
was kept, in process of germination. 
Note. — The septation above described differs materially from that detailed 
by Stahl in “ Bot. Zeit.,” 28 Feb., 1879, called by him the Gongrosira form, 
from its apparent identity with the Gongrosira dichotoma, Kutz. 
NORTH AMERICAN FUNGI. 
By M. C. Cooke. 
Polyporus (Anodermei) leucospongia, Che. & Hark. 
Albus ; pileo spongioso, mollissimo pulvinato, gibbo, margine 
tenui, incurvo ; poris subangulatis, aequalibus mm. diam.), dis- 
sepimentis tenuibus, fragilibusque, albis. 
On trunks. California. 
Pileus 3 to 4 inches by 1 to 1 J inches ; not unlike in some points 
Polyporus labyrinthicus Schwz. but spores much smaller, and not 
toothed or lacerated, whole substance very soft and spongy. 
Hymenochsete purpurea, Cke. <$f Morg. 
Laete purpurea, tota resupinata, spongiosa ; margine pallidiore, 
fibroso-radiato, hymenio velutino, contexto lilacino -pallido ; setis 
longioribus, leniter asperulis. 
On bark. Ohio, U.S. (A. P. Morgan.) 
This agrees with two or three species only in its spongy texture, 
and in the facility with which the long setae are isolated, adherent 
and continuous with their pedicels. Setae T to *14 mm. long, with 
pedicels of equal length. Its nearest ally is Hymenochcete crassa, 
Lev. More spongiose, with the setae twice as long as in H. 
scabriseta, and of a different colour. 
Hymenochaete scabriseta, Che. in Rav. Fungi Amer., No. 717. 
Resupinata, purpureo-fusca, molle, sub-spongiosa ; margine 
tenuiore pallidiori, demum leniter libero ; Hymenio velutino, laevi, 
