51 



Ganodonta gave rise to the Edentata and fixes the origin 

 of this important order of living mammals in North 

 America, in the earliest Eocene times. 



I. Family Stylinodontid.e. 



1. Parts of the skeleton of He7niga7ius atariidens 

 Cope. From the base of Puerco. Cope collec- 

 tion. 



2. Various parts of the skeleton of Psittacotherium 

 multifragum Cope. From the Upper Puerco 

 (Torrejon Beds), mainl}- from the expedition of 

 1896. Discovered by Dr. J. L. Wortman and 

 Barnum Brown. 



3. Lower jaws of Calamodojt simplex Cope, from 

 the Wasatch Eocene of the Big Horn Basin, Wyo. 

 Cope collection. 



4. Molar tooth of Stylinodon cylindrifer Cope, 

 from the Wind River Eocene, Wyo. Cope col- 

 lection. 



5. Drawings of Stylinodo7i minus Marsh, from the 

 Bridger Eocene of Wyoming. 



II. Family Conoryctid^. 



1. Parts of the skeleton of Onychodectes tissofiensis 

 Cope, from the Lower Puerco of New Mexico. 



2. Parts of the skeleton of Conoryctes coi7ima^ Cope, 

 from the Upper Puerco (Torrejon Beds), New 

 Mexico. 



Exhibition of water colors illustrating the extinct verte- 

 brates of North America, continuing the series which 

 was exhibited last year by Charles Knight ; 



1. The Restoration of JMastodoTi a77ie7'icanus. 



2. Paleosyops pahidosus. 



