OF WESTEKN NORTH AMERICA, 



95 



LOWER EOCENE— Continued. 

 - PERIS SOD ACTYLA— Continued. 

 EoUIDyE. 



Eohippus pernix Marsh 



Eohippus validtis Marsh 



Eohippus vasacciensis (Cope) 



Eohippus angustidens (Cope) , 

 Eohippus cuspidatus (Cope) . . 

 Eohippus cristatus ( Wortman) . 

 Eohippus cristonensis (Cope) . . 

 Eohippus montanus Wortman. 



Eohippus borealis Granger 



Eohippus resartus Granger 



1- 



2. 



3. 



4. 1 











X 











1 



! 







X 



X 









I ^ 















X 









X 







X 









X 



X 







X 









X 









X 





Eohippus venticolus (Cope) . . 

 Eohippus craspedotus (Cope) 



X 

 X 



TlTANOTHERHD^ ( =BR0NT0THERIID^). 



Lambdotherium popoagicum Cope ; X 



Eotitanops borealis (Cope) | X 



Eotitanops brownianus (Cope) i X 



ARTIODACTYLA. 



Trigonolestid^ ( = ? Dichobunid^). 



Trigonolestes brachystomus 



(Cope) 



Trigonolestes chacensis (Cope) . . 



Trigonolestes nuptus (Cope) 



Trigonolestes metsiacus (Cope) . 

 Helohyus etsagicus (Cope) 









X 



' ' i X 





i ' X 





i X 





Trigonolestes secans Cope . . . 



ACH^NODONTID^. 



Parahyus vagus Marsh — 

 Parahyus aberrans Marsh. 



; X 



i X 



MIDDLE EOCENE. 



First phase — Bridger (lower part). , Second phase — Bridger (upper part). 



! 



Orohippus zone. I Uintatherinm zone. 



1. Lower Bridger (horizon B), Wyoming. 



2. Upper Huerfano, Colorado. 



1. Upper Bridger (horizons C and D), Wyoming. 



2. Washakie Basin, Wyoming. 



Pelyeodus sp 



Notharctus tenebrosus Leidy 

 Notharctus rostratus (Cope) . 

 Notharctus affinis (Marsh) . . . 

 Notharctus anceps (Marsh).. 



PRIMATES. 



NOTHARCTID^. 

 1. I 2. 



Notharctus tyrannus (Marsh) 



Telmatolestes crassus Marsh 



Notharctus aut Telmatolestes i^p. div. 



1. I 2. 



Anaptomorphid^. 



Omomys carteri Leidy X 



Omomys pucillus (Marsh) X 



Omomys ameghini Wortman X 



Euryacodon lepidus Marsh X 



Anaptomorphus semulus Cope X 



? Anaptomorphus sp X 



? Smilodoctes graciUs (Marsh) « 



Hemiacodon gracilis Marsh X 



Hemiacodon pygraseus Wortm .n X 



Washakius insignis Leidy X 



Washakius sp X 



MlCROSYOPID^.f' 



Microsyops elegans (Marsh) 

 Microsyops typus (Marsh) . . 

 Microsyops sp 



Incertte sedis. 



X : Microsyops annectens (Marsh) X 



X Microsyops schlosseri Wortmnn X 



X X !: Microsyops sp X 



i>?=Mixodectid8e ( Insect ivora). 



