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

424, Chondrus affinis Harv.

Harvey, in Hook. & Arnott, Bot. of Beechey's Voyage, p. 408, 1841;
Nereis Bor.-Am., part 2, p. 181, 1853; Proc. Linn. Soc., Vol. VI, p. 173,
1862.

J. G. Agardh, Sp. Alg., Vol. II, p. 247, 1851; Vol. III, p. 178, 1876.

Kuetzing, Sp. Alg., p. 737, 1849; Tab. Phye., Vol. XVII, Pl. LIII, 1867.

Farlow, Proc. Amer. Acad., Vol. X, p. 370, 1875; Report of U. S. Fish
Commission for 1875, p. 701, 1876.

Anderson, Zoe, Vol. II, p. 223, 1891.

McClatchie, Proc. Southern Calif. Acad., Vol. I, p. 357, 1897.

On rocks between tide marks, Pacific Grove, California, July, 1896.

W. A. SETCHELL.

The specimens distributed are labelled C. affinis rather than C. canaliculatus J. Ag., because the cystocarps project upon both surfaces of the frond. There are certainly forms of Chondrus upon the California coast of which this is not true, and there seems to be some probability that there are two species of Chondrus represented.

W A S.

Yale University Herbarium

YU.091506