50 



a. Mounted Skeleton of Hoplophomus friincEzms Leidy, 

 An extinct Saber Tooth Tiger from the White River 

 Oligocene of South Dakota. Discovered by Dr. J. L. 

 Wortman. Mounted by Adam Herman. 



b. Disarticulated Skeleton of Hoplophoimis primceviis 

 Leidy. A remarkably perfect skeleton found by Mr. 

 I. A. Peterson in the Bad Lands of the White River 

 Oligocene, South Dakota. 



c. Mounted Skeleton of Palceosyops palodosos Leidy. One 

 of the ancestral Titanotheres from the Bridger Eocene of 

 Wyoming. Found by Dr. J. L. Wortman and mounted 

 by Adam Herman. 



d. Cast of Skull and Lower Jaws of Diplacodon^ the Uinta 

 Eocene ancestor of Titanothernim. Showing an early 

 stage in the development of the horns. 



e. Part of Skeleton of Euprotogonia pnercensis Cope. 

 One of the earliest of the hoofed mammals known. 

 From the Upper Puerco (Torrejon Beds) of New Mex- 

 ico. Found by Mr. Walter Granger of the Expedition 

 of 1896. 



/. Skull and lower jaws of Coryphodon sp. One of the 

 early Eocene forerunners of the Mintacheres. From the 

 Wasatch Eocene of the Big Horn Basin, Wyoming. 

 Expedition of 1S96. 



g. Lower jaw of Dissacus saurognathus^ a new species of 

 Creodont or ancient flesh-eater from the Upper Puerco 

 (Torrejon Beds) of the San Juan Basin, New Mexico. 

 Found by Mr. Barnum Brown, of the expedition of 1896. 



h. Specimens illustrating a new and primitive suborder of 

 ancestral Edentates (Ganodonta). The origin of the 

 great order Edentata which is principally South Ameri- 

 can in its distribution, has remained a puzzle to zoologists 

 until the discovery during the past year of a large part of 

 the skeletal structure of one of the members of this group 

 in the Upper Puerco (Torrejon Beds) of New Mexico. 

 This discovery indisputably establishes the fact that the 



