REPORT OF NATIONAL MUSEUM, 1910. AT 
The principal accessions in the division of invertebrate paleontology 
consisted of collections made by or under the direction ot Dr. Charles D, 
Walcott, Secretary of the Smithsonian Institution, and by members 
of the staff of the division. Of Cambrian fossils, extensive collections 
were obtained by Dr. Walcott at various localities in Alberta, Canada, 
during the summer of 1909, and later in Lawrence County, Pennsyl- 
vania; in northeastern Utah by Mr. J. M. Jessup, in the same general 
region by Mr. Eliot Blackwelder, and in Manchuria, China, by Dr. 
J. P. Iddings, who secured over 6,000 specimens. All of this field 
work, except that by Mr. Blackwelder, was conducted under the 
auspices of the Institution, in the interest of the important investiga- 
tions of this early geologic fauna, which has occupied the attention of 
Dr. Walcott for many years. Of Ordovician and Silurian fossils about 
3,000 specimens were collected in the Ohio Valley by the curator, 
Dr. R. S. Bassler, and an important series in northeastern Utah, by 
Mr. J. M. Jessup. Eocene fossils from Wilmington, North Carolina, 
to the number of over 2,000, were received as a gift from Prof. B. L. 
Miller, of Lehigh University. Other donations of which mention 
should be made comprised Tertiary fossils from the Olympic penin- 
sula of Washington, from Mr. Albert B. Reagan, of La Push, Wash- 
ington; and Ordovician and Silurian fossils from the island of Anti- 
costi, Canada, from the Yale University Museum. 
Among the additions in the division of vertebrate paleontology were 
a skull and lower jaw associated with other parts of the skeleton of a 
Cretaceous crocodile, Leidyosuchus, from Kansas; a complete skull 
and neck of Clidastes velox, from the same place; and a complete 
skeleton of a small rhynchocephalian reptile, Hom@osaurus mazximili, 
from Germany. Mr. J. W. Gidley, of the division, under the auspices 
of the United States Geological Survey, collected some important 
mammalian remains in the Fort Union formation, near Fish Creek, 
Sweet Grass County, Montana. These specimens are of rare scientific 
value and, together with previous accessions from the same formation 
and locality, make the Museum collection the best known of Fort 
Union mammals in the world. A collection of turtle remains from the 
Cretaceous of New Mexico, obtained by Mr. Gidley and Mr. J. H. 
Gardner, also for the Geological Survey, comprise the type specimens 
of eight new species. 
The division of paleobotany received from the Geological Survey 
the types and figured specimens of fossil plants described by Mr. 
Arthur Hollick in Monograph 50 of the Survey, entitled ‘‘The Cre- 
taceous Flora of Southern New York and New England.”’ Mention 
should also be made of a large number of undescribed fossil plants 
from Spitzbergen, presented by Mr. John M. Longyear, of Brookline, 
Massachusetts, and of about 350 fossil plants from the Laramie and 
