0 1 2 3 4 5 6 7 8 9 10
cm

Phycotheca Boreali-Americana.

Collins, Holden and Setchell.

1573. Rhaphidium falcatum

(Corda) Cooke.

Cooke, British F. W. Algae, p. 19, Pl. VIII, fig. 4, 1884.
Collins, Green Algae of N. A., p. 159, 1909.

R. polymorphum Wood, F. W. Algae of N. A., p. 85, Pl. VII,
fig. 3, 1873.

Wolle, F. W. Algae of the U. S., p. 197, 1887.

De Toni, Syll. Alg., Vol. I, p. 592, 1889.

Micrasterias falcata Corda, Alm. de Carlsbad, 1835, p. 121, Pl. II,
fig. 29.

In a small artificial pond in Middlesex Fells, Massachusetts,
Sept. 25, 1908.

F. S. COLLINS.

Yale University Herbarium

YU.094628

Phycotheca Boreali-Americana.

Collins, Holden and Setchell.

1574. Pediatrum duplex

Meyen.

Meyen, Beobachtungen, p. 772, Pl. XLIII, figs. 6-10, 16-19, 1829.

De Toni, Syll. Alg., Vol. I, p. 578, 1889.

Collins, Green Algae of N. A., p. 179, 1909.

P. pertusum Wolle, Desmids of the U. S., p. 154, Pl. LIII, figs.
33 & 34, 1884.

Among other algae, Round Pond, Tewksbury, Massachusetts,
Sept. 7, 1908.

F. S. COLLINS.

Yale University Herbarium

YU.094629