Säugethiere. 



-137- 



Periode 



Formation 



Mächtig- 

 keit 

 in Fuss 



Leitfossil 



Altes Seebecken 



Pleistocän 



Sheridan 



100 



Equus 



Silver Lake Oregon, 

 Nevada etc. 



Pliocän 



| Blanco 



lüU 



PUauchenia 



Great Plains (Nio- 

 brara). 



Hippidium 



Ö 



Ober- 



Loup Fork 



400 



Procamelus 



:cä 

 ü 



Deep Eiver 



150 



Cyclopidius 



Deep Eiver, Montana. 



o * 



Mittel- 













Unter- 



John Day 



1000 



Diceratherium 



John Day, Oregon. 











Protoceras 





Oligocän 



White Eiver 



800 



Oreodon 



Great Plains. 











Titanother htm 



Sioux Lake. 





Ober- 



Uinta 



SOO 



Diplacodon 



J Uinta Utah. 

 1 





Telmatotherium 



ü < 

 o 



Mittel- 



Bridger 



2000 



üintatherium 



Oberer Green Eiver, 

 Wyoming, Huer- 

 fano. Colorado. 



m 



Unter- 



Wind Eiver 



oUO 



Bathyopsis 



Wind Eiver , Wyo- 

 ming. 







Wasatch 



2000 



Coryphodon 



Big Horn, Wyoming. 



Basal- 



Torrejon 



300 



Pantolanibda 



J Xeu-Mexico. 



eocän 



Puerco 



500 



Polymastodon 



P. gigantea, Esthonyx Pur meist er i , Calamodon simplex , Phenacodus 

 primaevus, Ph. Wortmani, Ph. brachypternus, Meniscotherium chamense, 

 M. terraerubrae, Coryphodon testis, C. lobatus, C. elephantopus, C. hama- 

 tus, C. latidens , Hyracotherium vasaniense , H. index, H. tapirinum, 

 Systemodon protapirinus, Trigonolestes chacensis. 



Das Wind Eiver-bed im Wind Eiver-Becken von Wyoming nnd 

 im Hnerfano-Becken in Colorado: Hyopsodus paidus, H. vicarius , Pely- 

 codus frugivorus, Microsyops gracilis, Paramys deUcatior, P. delicatissi- 

 mus, Viverravus altidens, V. gracilis, Uintacyon canavus, U. brevirostris, 

 Sinopa Withiae, Estlionyx acutidens, Phenacodus Wortmani, Ph. osborni- 

 anus, Coryphodon ventanus, Bathiopsis fissidens, Hyracotherium craspe- 

 dotum, Protorohippus venticolus, Lambdotherium popoagicum , Heptodon 

 calciculus, Telmatotherium boreale. 



Das Bridge r-bed, ansser im Bridger-Becken auch im Huerfano- 

 und Washakie-Becken : Hyopsodus paulus, H. vicarius, Microsyops elegans, 



