Polysiphonia of the Tropical Pacific, I — Hollenberg 
97 
is also grateful for the help of Dr. C. H. La- 
moureux, who took many of the photomicro- 
graphs, and for access to Dr. M. S. Doty’s excel- 
lent phycological library. For loans of, or access 
to, herbarium materials the writer is grateful to: 
the Rijksherbarium, Leiden; the University of 
Lund, Sweden; Trinity College, Dublin; Uni- 
versity of Copenhagen ; the Natural History 
Museum, Wien, Austria; the Smithsonian In- 
stitution, Washington, D.C. ; the New York 
Botanical Garden; William Randolph Taylor, 
University of Michigan; and the University of 
California, Berkeley. Latin diagnoses were pre- 
pared by Dr. Hannah Croasdale. 
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