304 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 52. 



Plate 22. 



Plioplarchus septemspinsous Cope, p. 295. 



One of the type-specimens, X^- 



Miocene (?); Van Horn's Rancli, on the John Day River, Oregon. 



Plate 23. 



Priscacara dartonae, new species, p. 296. 



Complete skeleton of the holotype, X*. 

 Eocene (Green River); near Fossil, Wyoming. 



