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

Brown University - Algae
Catalog #: ABRU00002579
I. Holden s.n.
Antithamnion americanum (Harvey) Kjellman
United States, Connecticut, Bridgeport, CT

Field Museum of Natural History
Catalog #: C0511434F
I. Holden #s.n.
Antithamnion americanum (Harvey) Kjellman
United States, Connecticut, Fairfield, Bridgeport

Yale University Herbarium
Catalog #: YU.091125
Isaac Holden s.n.
Antithamnion americanum (Harvey) Kjellman
United States, Connecticut, Fairfield, Bridgeport; Bridgeport, CT

University Herbarium, University of California, Berkeley
Catalog #: UC1836225
Isaac Holden #47
Scagelia pylaisaei (Montagne) M.J.Wynne
United States, Connecticut, Fairfield, Bridgeport.

University of Michigan
Catalog #: 641888
Isaac Holden #s.n.
Antithamnion americanum (Harvey) Kjellman
United States, Connecticut, Bridgeport

University of Michigan
Catalog #: 641890
Isaac Holden #s.n.
Antithamnion americanum (Harvey) Kjellman
United States, Connecticut, Bridgeport

Michigan State University Algae
Catalog #: MSC0184586
Isaac Holden #s.n.
Scagelia pylaisaei (Montagne) M.J.Wynne
United States, Connecticut, Fairfield, Bridgeport

Miami University - Algae
Catalog #: 000186446
Isaac Holden #s.n.
Antithamnion americanum (Harvey) Kjellman
United States, Connecticut, Bridgeport

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00223194
7324beaa-136a-4d3c-b04d-e7c0be189c5a
N. L. Gardner #s.n.
Cystoseira lepidium Ruprecht
United States, Washington, Whidby Island