FOLDER 1. 



A Correlation of the Eden, San Timoteo, Bautista, and Certain Other Horizons. 



Equine Cheek Teeth (see P. 287) 



(Relative stages indicated by letters, a, b, c, etc.) 



Pacific Coast Province 



Bautlsta Creek (bh) 

 Equus bautistensis, n. sp. 



San Timoteo 



Pliohippus francescana, n. sp. 

 Pliohippus france-^-cana minor, 

 n. subsp. 



Rancho La Brea {d) 

 Equus occidentalis Leidy 



Upper Etchegoin (/) 



Pliohippus proversus Merriam 



Great Basin Province 



California, Oregon, 

 and Idaho (c) 



Equus pacificus Leidy 

 E(iuus idahoensis Merriam 



Based on the Characters of 



Eastern and Atlantic Area (a) 



Equus complicatus Leidy 

 Equus fraternus Leidy 



Great Plains Province (b) 

 Loup River, Nebraska 

 Equus excelsus Leidy 

 Equus niobarensis Hay 



Staked Plains, Texas 

 Equus scotti Gidley 



Blanco, Texas 



Pliohippus sunplicidens 

 (Cope) 



Pliohippus cummiusii (Cope) 



Eden (a) 



Pliohippus osborni, n. sp. 

 Pliohippus osborni, sp. A, n. 

 subsp. 



Pliohippus edensis, n. sp. 

 Pliohippus edensis, subform 

 A,_ 



Pliohippus, spectans-like 

 Pliohippus edensis, subform 

 B, 



Pliohippus, indet. sp. 



Middle Etchegoin (d) 



Pliohippus coalingensis Mer- 



Loyv^er Etchegoin 

 Pliohippus, sp. 

 Protohippus tehonensis Mer- 

 riam 



Hipparion gratum tchonense 

 Merriam 



Hipparion, near molle Mer- 

 riam 



Rattlesnake (c), and 

 Thousand Creek (b) 

 (c) Pliohippus, near fair- 

 banski Merriam 

 - (b) Pliohippus fairl)anksi 

 Merriam 

 (c) Pliohippus spectans 

 Cope 



(c) Hipparion, near occi- 



dentale Leidy 

 (c) Hipparion sinclairi 



Wortman 

 ((■) Hipparion, near anthonyi 



Merriam 

 (h) Neohipparion leptode 



Merriam 



Ricakdo 



* Pliohippus tantalus Merriam 

 Pliohippus fairbanski Merriam 

 Pliohippus, near mirabilis 

 Leidy 



Hip])arion mohaven.se Mer- 

 riam 



Hipparion mohavensc callo- 

 donte Merriam 



Snake Creek, Nebraska (c) 

 Pliohippus cf. mirabilis Leidy 

 Pliohippus leidyanus Osborn 

 Hipparion cf. occidcntale 

 Leidy 



Hipparion gratum Leidy 

 Hipparion cf. affine Leidy 

 Protohippus cf. placidus 

 Leidy 



Protohippus near perditus 

 Leidy 



