Collins, Holden & Setchell, Phycoth. Bor.-Amer.
Collins, F.S.; Holden, I.; Setchell, W.A. [1-2300]

Brown University - Algae
Catalog #: ABRU00003601
W. A. Setchell s.n. 25 June 1899
Cladophora arcta (Dillwyn) Kützing
United States, Alaska, west shore of Amaknak Island, Unalaska Bay, AK

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00212072
a6b37178-0cd0-41d0-b89e-72903809013a
W. A. Setchell; A. A. Lawson s.n. 25 June 1899
Cladophora arcta (Dillwyn) K
United States, Alaska, west shore of Amaknak Island, AK

Field Museum of Natural History
Catalog #: C0528957F
W.A. Setchell #s.n. 25 June 1899
Cladophora arcta f. pulvinata (Foslie) Collins
United States, Alaska, West shore of Amaknak Island

University of Michigan
Catalog #: 677981
W.A. Setchell #s.n. 25 June 1899
Acrosiphonia arcta (Dillwyn) Gain
United States, Alaska, West shore of Amaknak Island

University of Michigan
Catalog #: 684000
W.A. Setchell #s.n. 25 June 1899
Cladophora arcta f. pulvinata (Foslie) Collins
United States, Alaska, West shore of Amaknak Island

Michigan State University Algae
Catalog #: MSC0181047
W.A. Setchell #s.n. 25 June 1899
Acrosiphonia arcta (Dillwyn) Gain
United States, Alaska, West shore of Amaknak Island

Miami University - Algae
Catalog #: 000187580
W.A. Setchell #s.n. 25 June 1899
Cladophora arcta (Dillwyn) Kützing
United States, Alaska, West shore of Amaknak Island

Yale University Herbarium
Catalog #: YU.092001
William Albert Setchell s.n. 25 June 1899
Cladophora arcta (Dillwyn) Kützing
United States, Alaska, west shore of Amaknak Island, Unalaska Bay, AK