CONTENTS 



History of theory and of exploration 899 



Asiatic centers of origin of mammals 899 



Explorations in Mongolia 899 



Orders of mammals represented in the collections- _ 900 



Families absent 900 



Carnivora 901 



Titanotheres 901 



Older formations 901 



The Tertiary formations of Mongolia and their faunas.- 901 



Names, names of subdivisions, and thickness 901 



Pliocene or Pleistocene: Hung Kureh formation 903 



Miocene (?) : Pang Iviang formation 904 



Miocene: Loh formation 905 



Oligocene: Hsanda Gol formation 905 



Oligocene: Houldjin formation 907 



Lower Oligocene: Ardyn Obo formation 908 



Summit of the Eocene: Shara Murun formation 910 



Upper Eocene: Irdin Manha formation 911 



Middle (?) Eocene: Arshanto formation... 912 



The Tertiary formations of Mongolia — Continued. Fage 



Basal Eocene or upper Cretaceous: Gashato formation. 913 

 History of the discovery of remains of titanotheres in 



Mongolia 913 



Generic and specific characters of the Mongolian titano- 

 theres 916 



Descriptions of species 918 



Subfamily Dolichorhininae 918 



Subfamily Manteoceratinae (Brontopinae) 924 



Subfamily Telmatheriinae 932 



Subfamily Brontopinae 936 



Subfamily Menodontinae 938 



Mongolian titanotheres of uncertain generic reference 939 



Subfamily Manteoceratinae (Brontopinae) 939 



Subfamily Dolichorhininae 940 



Titanotheres of eastern Europe 941 



Surviving embolotheres of M ongolia 942 



Epilogue of the titanothere monograph 944 



Bibliography 944 



897 



