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

256. Nostoc microscopicum Carm.

Bornet & Flahault, Revision des Nost. Het., part 4, p. 211, 1888.
N. rupestre Farlow, Appalachia, Vol. III. p. 256, 1884.

On wet rocks, Ripton Gorge, Vermont, Sept., 1896.

W. G. FARLOW.

YU.091336

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

257. Tolypothrix tenuis Kuetz.

Bornet & Flahault, Revision des Nost. Het., part 3, p. 122, 1887.

On grasses in pools in abandoned brickyard, Baltimore, Maryland,
Oct. 10, 1896.

J. E. HUMPHREY.

YU.091337