Phycotheca Boreali-Americana Collins, Holden & Setchell.

1719. Calothrix Kawraiskyi Schmidle.

Schmidle, Algen der Hochseen des Caucasus, p. 9, 1897.

Forti, Syll. Myx., p. 624, 1907.

a. Forming a layer on a glass aquarium jar, Physical Laboratory of the University of California, Berkeley, California, March 15, 1906.

N. L. GARDNER.

b. On old Zygnema etc., Charleston, Illinois.

E. N. TRANSEAU.

1720. Calothrix scopulorum Ag.

Agardh in Bornet & Fiahault, Revision des Nost. Het., part 1, p.
353, 1886.

Harvey, Nereis Bor.-Am., part 3, p. 105, 1858.

Setchell & Gardner, Algae of N. W. America, Univ. of Calif. Publ., Bot., Vol. I, p. 197, 1903.

Forti, Syll. Myx., p. 608, 1907.

Tilden, Minn. Algae, Vol. I, p. 258, 1910.

Growing in small pools in the granite blocks of the government breakwater, San Pedro, California, Dec., 1906.

N. L. GARDNER.

The same species, from Massachusetts, was distributed as P. B.-
A., No. 805.