With one exception the present work is based entirely upon National Museum material, the exception being a specimen generously loaned by Mr. W. H. Reed, of the University of Wyoming, and described here as a new type species.
This book is a reproduction of that original, which has been scanned and cleaned by state-of-the-art publishing tools for better readability and enhanced appreciation.
In the present paper it is proposed to discuss all of the Theropodous dinosaur specimens contained in the collections of the United States National Museum.