516 THE WASATCH AND BRIDGER FAUN^. 



ruaiy, 1872, under the name oi Bathnodon radians, and the description wa& 

 at that time confined to the superior molars, the femur, and the humerus. 

 In February, 1873, in "The Short-footed Ungukta of the Eocene of 

 Wyoming", I described the characters of the scapuhx and astragahis and 

 its connections, which furnished reasons for removing the genus from the 

 Perissodadyla and placing it in the Proioscidia, under a subordinal division, 

 which was named the Fantodonta. The same course Avas pursued in the 

 Annual Report of the United States Geological Survey of the Territories 

 for 1872 (1873), where a second American species, B. latipes, was added. 

 The next additions to our knowledge of the osteology of Cori/phodon are 

 due to the exploration of the Eocene beds of New Mexico, conducted by 

 the writer, in 1874, in connection with the United States Geographical 

 Surveys West of the 100th Meridian. On November 28, 1874, in extracts 

 from the Report of the Chief of Engineers, published in advance, I gave 

 the general characters of the skull, and of the hind foot, determining the 

 number of toes in the latter. The temporary dentition and three new 

 species were also described. In some remarks before the Academy of 

 Natural Sciences of Philadelphia, made March 9, 1875, I pointed out the 

 near relation of these animals to the species of Corypliodon. In flae "Sys- 

 tematic Catalogue of Vertebrata of the Eocene of Wyoming", April, 1875, 

 the structure of the fore foot, including the number of digits, was pointed 

 out, and the group Fantodonta removed, with the Dinocerata, to a new order, 

 the Ambli/poda ; Corypliodon was referred to the Fantodonta, and two species 

 were added. I announced the generic identity of the American and 

 European forms in a communication before the Academy of Philadelphia, 

 made April, 1876 (published April 26), pointing out the subordinate char- 

 acters of the respective types.* My final report to Captain Wheeler, 

 United States Army (1877), completed the description of the osteology, 

 so far as accessible to me; and I may add that this is so far complete that 

 there only remain unknown the number of the ribs and dorsal and lumbar 

 vertebrte, and the structure of the hyoid apparatus. 



Genera. — There are five genera of Coryphodontidce: Corypliodon, Bath- 



* A short time after this, Prof. O. C. Marsh asserted the identity of Corijphodon and Bathmodon 

 in the Amer. Joum. Sci. and Arts. 



