48 REPORT OF NATIONAL MUSEUM, 1909, 



Mr. A. C. Silberliiig from the Fort Union beds of Sweet Grass 

 Connt}^, Montana, parthj^ for the United States Geological Survey 

 and partly under the auspices of the National Museum. This collec- 

 tion contains over 300 small and fragmentary specimens, representing 

 many new and little-known mammalian forms, and is considered of 

 great importance, both geologically and paleontologically. A fossil 

 rhinoceros skull, obtained from Mr. E. Pfizenmayer, of St. Peters- 

 burg, Russia, forms a valuable addition to the exhibition series. 

 Two accessions, transferred through the head curator of biology, 

 comprise a very considerable and interesting series of cetacean re- 

 mains, chiefly from the Miocene at Calvert Cliffs, Maryland, includ- 

 ing some new discoveries. 



Mr. James AV. Gidley, custodian, prepared and made a preliminary 

 study of about 100 specimens of the small mammals from the Fort 

 Union beds, examining collections at the American Museum of Nat- 

 ural History in connection with this work. He also described Bnsilo- 

 saurus from the southern coastal plain, and devoted considerable 

 time to the restoration of the skull of this form, with the view of in- 

 stalling an entire skeleton with the exhibition series in the new build- 

 ing. Other researches in progress or completed by Mr. Gidley related 

 to Ptilodus.^ Basal Eocene mammals, a specimen of Glyptodon from 

 Texas, and the foot and limb structure in mammals. 



The work of Mr. Charles W. Gilmore, custodian of fossil reptiles, 

 has been largely directed to the preparation of materials for exhibi- 

 tion. The more important pieces so far made ready are fairly com- 

 jjlete skeletons of C amptosaurus hrowni Gilmore and Ceratosaurus 

 nasicomis Marsh. The skull and neck of a Tylosaurus and the wing 

 of a large Pteranodon have also been prepared for exhibition. The 

 models of the ceratopsian skulls received in exchange from the Yale 

 Museum a year ago have been arranged for exhibition. 



A card catalogue of the materials now in storage belonging to this 

 division has been prepared and is considered to be fairly complete. 

 Mr. Gilmore completed his study begun the previous year on the 

 camptosaurian material, and a paper entitled "A new Rhynchocepha- 

 lian from the Jurassic of Wyoming." He also began a report on 

 the extinct reptilian fauna of North Carolina. During June he ex- 

 amined the laboratory ' and workshop equipment of the Carnegie 

 Museum at Pittsburg, Avith reference to fitting up similar quarters in 

 the new building. 



Paleobotany. — This division received only two accessions that need 

 be mentioned in this connection — one of 26 specimens, including G 

 types, from the Kootanie beds; the other comprising over 200 speci- 

 mens of fossil wood from Arizona, which have been placed in the 

 hands of Prof. E. C. Jeffrey, of Harvard University, for study. No 



