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Dr. J. A. Shafer, Museum Custodian, has continued his 
studies onthe Arborescent Flora of North America and onsome 
North American drug-producing plants. He also prepared 
a List of the Vascular Flora of Ohio Pyle, Pa., from the 
plants collected during the Botanical Symposium of 1905, as 
well as from those collected on previous visits to that region. 
Dr. Arthur Hollick, Curator, has had charge of the collec- 
tion of fossil plants. With the assistance of Mr. Edward W. 
Humphreys, he has accomplished much as regards the nomen- 
clature of fossil plants. This work has long been needed, 
especially in connection with the original labels on the speci- 
mens belonging to the Columbia University collection. The 
labels of the public exhibits were revised by Dr. Hollick and 
all of them brought up to date. A large amount of Cre- 
taceous material of the Northeastern United States was col- 
lected jointly with Dr. E. C. Jeffrey of Harvard University. 
A preliminary paper under the joint authorship of Dr. Hollick 
and Dr. Jeffrey has already been issued. ‘* Affinities of 
Certain Cretaceous Plant Remains Commonly Referred to 
the Genera Dammara and Brachyphyllum” appeared in the 
American Naturalist for March, 1906, and further investi- 
gations of the material just referred to are under way. 
Mrs. Britton continued the supervision of the collection of 
mosses, and gave especial attention to naming the specimens 
collected in Porto Rico and Jamaica, having accompanied 
Dr. Britton on his expeditions to the higher mountains of these 
islands and assisted in collecting and preparing specimens of 
lichens and fungi. Miss Delia W. Marble also went on both 
these expeditions and gave efficient aid in collecting and pre- 
paring specimens. Short notes were published in the Bry- 
ologist by Mrs. Britton. She has also begun the incorpora- 
tion of the herbarium of the late Mr. Mitten into the perma- 
nent moss collection. 
Professor L. M. Underwood continued to devote the time 
he spent at the Garden to the development and improvement 
of the fern collection. 
The writer, in addition to his general curatorial duties, 
