Phycotheca Boreali-Americana Collins, Holden & Setchell.

1726. *Oocystis novae semliae* Wille.

Wille, Ferskvandsalger fra Novaja Semlja, Ofv. K. Vet. Akad. Forh.,
Vol. XXXVI, No. 5, p. 26, Pl. XII, fig. 3, 1879.
De Toni, Syll. Alg., Vol. I, p. 665, 1889.

Floating in great masses in a pond, Golden Gate Park, San Francisco, California, Feb., 1910.

N. L. GARDNER.

1727. *Oocystis solitaria forma major* Wille.

Wille, Ferskvandsalger Novaja Semlja, p. 26, 1879.
De Toni, Syll. Alg., Vol. I, p. 664, 1889.
Collins, Green Algae of N. A., p. 160, 1909.

Among other algae in a small pond, Eastham, Massachusetts,
July 7, 1910.

F. S. COLLINS.