REPORT OF NATIONAL MUSEUM, 1921. 85 
Approximately 25,000 specimens of Silurian and Devonian fossils 
from Maine, representing the final shipment of collections made by 
the late Prof. H. 8. Williams, have been transferred from the Geo- 
logical Survey. The collections from these horizons have been 
further supplemented by valuable and much-needed materials se- 
cured through three exchanges with Raymond R. Hibbard, of Buf- 
falo,)N.» .¥. 
Additional noteworthy accessions are: An especially selected lot 
of Carboniferous foraminifera, gift of Hon. Charles H. Morrill, 
Lincoln, Nebr.; a large collection containing many new species, par- 
ticularly of fossil sponges and trilobites, from a hitherto unrepre- 
sented area in Nevada, received in exchange from Mr. H. G. Clinton, 
Manhattan, Nev.; and a large slab of fossiliferous Ordovician lime- 
stone from southwestern Ohio, obtained by the curator for exhibi- 
tion purposes. 
By far the most important accession to the section of vertebrate 
paleontology is a collection of more than a hundred specimens of 
vertebrate remains, mostly mammalian, representing a new Pliocene 
fauna of 30 or more species, obtained by Mr. J. W. Gidley, working 
under the joint auspices of the National Museum and the Geological 
Survey. The collection includes basic material for two skeleton 
restorations, one of a little-known species of mastodon, the other a 
new species of Glyptotherium. Mr. Gidley also collected from the 
“bone quarry ” at Agate, Nebr., a block or slab, 54 by 34 feet, and 
14 inches thick, weighing upward of 4,000 pounds, and containing 
numerous fossil bones, mostly of the little two-horned rhinoceros 
Diceratherium cooki. 
Mr. C. W. Gilmore, while investigating certain fossiliferous areas 
in New Mexico, noted elsewhere, secured interesting mammalian 
remains. 
Of the materials acquired by exchange, mention may be made of 
a fossil turtle, Bystra nanus, a rare specimen and the type of the 
genus, received from the Buffalo Society of Natural Sciences; a 
disarticulated skull and lower jaws of the crested dinosaur Stephan- 
osaurus, the first representative of this reptile to be secured for the 
national collections; part of a skull and lower jaw of a Pleistocene 
elephant from an unknown locality, and an elephant tooth from 
Otranto, Italy, received from Ward’s Natural Science Establish- 
ment; approximately 200 specimens of Pleistocene mammals from a 
cave deposit near Coconino County, Ariz., received from the Uni- 
versity of Arizona; and two skulls of Diceratheriwm cooki and casts 
of two Permian reptile skulls from the University of Chicago. 
The lower jaw of a Pleistocene mastodon from near Yazoo City, 
Miss., gift of the Yazoo Commercial Club; a jawbone with teeth 
intact of the fossil shark, E'destus heinrichsii, gift of the Southern 
