402 EDITORIAL 



repeated years in digging out and shipping to the East the 

 immense and rare bones, which were carefully worked out after 

 reaching the Museum. 



A bare list of the more important types of vertebrates, which 

 he either first discovered or first elaborated, is of itself enough 

 to exhibit the great place his labors must occupy in the progress 

 of science. 



In 1862, he announced the discovery of the Enaliosaurus in 

 the Carboniferous rocks of Nova Scotia — a large Amphibian 

 with biconcave vertebrae. It was Marsh who, in 1868, disputed 

 the organic nature of Paleotrochis ; and in the same year the 

 metamorphosis of the Siredon was described. Fossil birds were 

 discovered in both Tertiary and Cretaceous rocks, in 1870. The 

 Rocky Mountain expedition of 1870 resulted in the discovery of 

 the Mauvaises Terres formation in Colorado. In 1871, fossil 

 serpents were reported from the Tertiary deposits of Wyoming, 

 and a gigantic Pterodactyl from the Cretaceous of Kansas. In 

 the following year Hesperonis, the wonderful bird with teeth, 

 was announced, and the skull and limb bones of the Mosasaurus, 

 the skeleton of Tinoceras, and remains of Quadrumana from 

 the Eocene of Wyoming described. In 1873, new species of 

 Ichthyornis, another toothed bird, were described, and a new 

 subclass, Odontornithes, was founded, establishing the link 

 between Birds and Reptiles. And the new order Dinocerata, 

 with many enormous species, was defined and elaborated. In 

 1874, another expedition was conducted to the Rockies, and the 

 Brontotheridae were fully defined, and the fossil horses and their 

 ancestors of the Tertiary were described. Also, a paper was 

 written illustrating the small brain capacity of the early Eocene 

 mammals. In 1875, a new order of Eocene mammals was 

 announced, and an important statement of the affairs of the Red 

 Cloud agency was made to the President. 



In the following year the characters of the Dinocerata, the 

 Tillodontia, the Brontotheridae, the genus Coryphodon, and a 

 new suborder of Pterosauria, were elaborated in important 

 papers. In 1877, wonderful Dinosaurs from the Jurassic were 



