Phycotheca Boreall-Americana.

Collins, Holden, and Setchell.

977. Cladophora expansa (Mert.) Kuetz.

Kuetzing, Tab. Phye., Vol. III, p. 27, Pl. XCIX, 1853.

Farlow, N. E. Marine Algae, p. 55, 1881.

De Toni, Syll. Alg., Vol. I, p. 319, 1889.

Collins, Holden and Setchell, Phye. Bor.-Am., No. 121, 1895.

Conferva expansa Mertens in Juergens, Algae Aquaticae, Dec. V,
No. 8, 1820.

On grass stalks and mussels in shallow marsh pool, Bridgeport,
Connecticut, August 16, 1891.

ISAAC HOLDEN.

These specimens represent the first stage of the plant, attached
to sticks, stones, etc. Later it forms loose floating masses repre-
sented by No. 121, P. B.-A.

Yale University Herbarium

YU.092060