The Origin of the Desert Climax and Climate 113 



Ungulates — 

 Equus occidentalis 

 Camelops 

 Camel 



Proboscideans — 

 Mastodon sp. 



Ground forms — 

 Lophortyx californica 

 Zenaidura macroura 

 Oxyechus vociferus 



Water forms — 

 Podilymbus podiceps 

 Anas platyrhynchos 

 Mareca americana 

 Nettion carolinense 

 Querquedula cyanoptera 

 Spatula clypeata 

 Dafila acuta 

 Marila americana 

 Erismatura jamaicensis 

 Chen hyperboreus 



McKlTTRICK 

 MAMMALS 



Bison sp. 



Antilocapra ? 



BIRDS 



Geococcyx californianus 

 Corvus corax 



Branta dickeyi 

 Jabiru mycteria 

 Ardea herodias 

 Grus canadensis 

 Rallus virginianus 

 Recurvirostra americana 

 Macrorhamphus griseus 

 Totanus melanoleucus 

 Pelidna alpina 



Ungulates — 

 Equus occidentalis 

 Camelops hesternus 

 Bison antiquus 

 Bison latifrons 



Proboscideans — 

 Elephas imperator 

 Elephas columbi 



Rodents — 



Lepus californicus bennetti 

 Sylvilagus bachmani cinerascens 

 Sylvilagus audoboni sanctidiegi 

 Citellus beecheyi fisheri 

 Dipodomys agilis agilis 

 Thomomys bottae pallescens 

 Neotoma intermedia intermedia 

 Neotoma fuscipes macrotis 



Rancho La Brea 



MAMMALS 



Antilocapra americana ? 

 Odocoileus hemionus ? 

 Capromeryx minor 

 Platygonus sp. 



Mastodon americanus 



Perognathus panamintinus brevinasus 

 Perognathus californicus californicus 

 Peromyscus maniculatus gambeli 

 Peromyscus californicus insignis 

 Peromyscus eremicus fraterculus 

 Microtus californicus neglectus 

 Reithrodontomys megalotis longicaudus 

 Onychomys torridus ramona 



