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

Brown University - Algae
Catalog #: ABRU00004139
F. S. Collins s.n. 20 October 1906
Calothrix crustacea Thuret ex Bornet & Flahault
United States, Massachusetts, Mattapoisett, MA

Rutgers University, Chrysler Herbarium - Macroalgae Collection
Catalog #: CHRB0012320
F. S. Collins #1406 20 October 1906
Calothrix crustaceae f. simulans
United States, Massachusetts, Plymouth, Mattapoisett;

Michigan State University Algae
Catalog #: MSC0181508
F.S. Collins #s.n. 20 October 1906
Calothrix crustacea f. simulans Thuret ex Bornet & Flahault
United States, Massachusetts, Plymouth, Mattapoisett

Miami University - Algae
Catalog #: 000188476
F.S. Collins #s.n. 20 October 1906
Calothrix crustacea f. simulans F.S.Collins, 1907
United States, Massachusetts, Plymouth, Mattapoisett

Yale University Herbarium
Catalog #: YU.094446
Frank Shipley Collins s.n. 20 October 1906
Calothrix crustacea Thuret ex Bornet & Flahault
United States, Massachusetts, Mattapoisett, MA