Yale University Herbarium

YU.091538

Phycotheca Boreali-Americana. Collins, Holden, and Setchell.

456. Spirogyra tenuissima (Hass.) Kuetz.

Kuetzing, Sp. Alg., p. 437, 1849.

Petit, Spirogyres des Environs de Paris, p. 6, Pl. I, figs. 1-3, 1880.

Wolle, F. W. Algae of the U. S., p. 152 Pl. XXXII, figs. 9 and 10, 1887.

De Toni., Syll. Alg., Vol. I, p. 765. 1889.

In a rock pool, just above high water mark, Easton's Point, Newport, Rhode Island, April 25, 1898.

Mrs. W. C. SIMMONS.

Mixed with sterile filaments of other species of Spirogyra.

Yale University Herbarium

YU.091539

457. Zygnema insigne (Hass.) Kuetz

Kuetzing, Sp. Alg., p. 444, 1849.

Wolle, F. W. Algae of the U. S., p. 223, Pl. CXLIII, figs. 4-6, 1887.

De Toni. Syll. Alg., Vol. I, p. 730, 1889.

In small pools near Chestnut Hill, Massachusetts, May 7, 1898.

G. T. MOORE, Jr.