1873.] 209 



J [Cope. 



teeth as though they were homologous in the two genera. I there 

 identified those teeth in Synoplotherium as canines, adding that they 

 were probably the same in Anchippodus. Having determined the car- 

 nivorous affinities of the former genus, the homology of these apparently 

 similar teeth in the latter becomes problematical. With our present 

 knowledge, the type of molar teeth in Anchippodus resembles that of 

 many ungulates, and it is not therefore probably allied to Synoplotherium. 

 Nevertheless it is far from certain that the teeth in question are incisors, 

 and that the genera are in nowise related, though a similar modification 

 of a remarkable character in distinct but co-existent types is by no 

 means an unprecedented circumstance. 



The remains on which the above identification is based, were found 

 by the writer on a terrace of the Mammoth Buttes near South Bitter 

 Creek in Wyoming. The cranium and fore foot and leg were excavated 

 from the deposit. 



Formation, the Bridger Group of the Eocene of Hayden. 



Prof. Marsh has described two genera of Camivora from the same 

 formation, embracing species approaching this one in size. They are 

 both distinguished by the broader forms of the crowns of the inferior 

 molar teeth and other points. 



Stated Meeting, April 18th, 1878. 



Present, 23 members. 



Vice-President, Prof. Cresson, in the Chair. 



A letter with photograph, was received from Mr. Edmund 

 Quincy, dated Dedham, Mass., April 11th, 1873. 



A letter requesting a set of the Society's Proceedings was 

 received from Prof. Frank H. Bradley, of the East Tennessee 

 University, State Agricultural College, Knoxville, dated 

 April 15, 1873. On motion, the University was ordered to 

 be placed on the Correspondents' List, to receive the Pro- 

 ceedings from the beginning. 



A letter requesting missing Numbers 83, 84, 85, was re- 

 ceived from P. Ketzschen, dated Chemnitz, Jan. 8, 1873, and 

 referred to the Secretaries to act. 



A letter proposing exchanges with the Victoria Institute, 

 or Philosophical Society of Great Britain, was received from 

 Mr. F. Petrie, Secretary, dated 8 Adelphi Terrace, Strand 

 London, W. C, 1st April, 1873. On motion, that Institute 

 was ordered to be placed on the Correspondents' List, to re- 

 ceive Transactions and Proceedings. 



A. P. 8.— VOL. XIII. 2A 



