GEOGRAPHIC DISTRIBUTION 



15 



Montana — Continued 



Lewis & Clark County — Continued 



Merycoides cursor, M. latidens, Pro- 

 merycochcerus hollandi, P. h. hatcheri, 

 P. montanus grandis 



Meagher County 



Smith River Valley, Ft. Logan area — 

 Cyclopidius brevifacies, C. decedens, C. 

 emydinus, C. jeliceps, C. heterodon, C. 

 incisivus, C. simus, Leptauchenia decora, 

 Merychyus pariogonus, Mesoreodon 

 chelonyx, M. intermedins, Poatrephes 

 paludicola, Promerycochcerus montanus, 

 Ticholeptus zygomaticus 



Silver Bow County 



1 mile southeast of Woodin, on Divide 

 Creek — Ticholeptus breviceps 



Nebraska 



Banner County 



Pumpkin Creek and near Harrisburg — 



Leptauchenia decora, L. nitida, Mery- 

 coidodon culbertsonii 



Brown County 



Devil's Gulch and Plum Creek — Metore- 

 odon major, M. projectus 



Cherry County 



Bear Creek — Leptauchenia decora 

 Schliegel's Creek — Metoreodon projectus 

 Wolf Creek — Merycochcerus caenopus 



C leyenne County 



Blue Creek — -Cyclopidius simus decedens 

 Crow Buttes — Leptauchenia decora 



Dawes County 



Rattlesnake Butte, near Chadron — Lep- 

 tauchenia decora 



White River Valley — Leptauchenia nitida, 

 Merycoidodon culbertsonii 



Morrill County 



Lawrence Fork and Court House Rock — 



Leptauchenia decora 

 Near Redington — Cyclopidius densus 



Scotts Bluff County 



Scotts Bluff and Ft. Mitchell — Eporeodon 

 montanus, E. socialis, Leptauchenia 

 decora, L. nitida, Merycoidodon a finis, 

 M. culbertsonii, M. platycephalus 



Nebraska — Continued 



Sioux County 



Near Agate and along Niobrara River — 

 Eporeodon bullatus, E. major, E. m. 

 hybridus, E. ? pacificus, Merychyus 

 arenarum minimus, M. elegans, M. har- 

 risonensis, M. siouxensis, M. sp., Mery- 

 cochosrus ma gnus, M. proprius, M. sp., 

 Merycoidodon a finis , M. culbertsonii, 

 M. c. periculorum, M. gracilis, Meso- 

 reodon sp., Metoreodon major, M. 

 medius, M. projectus, M. relictus, 

 Ticholeptus hypsodus 



Sinclair Draw and Stonehouse Draw — 

 Pronomotherium siouense 



Squaw Butte — Merychyus sp., Mesoreodon 

 megalodon 



Squaw Creek — Phenacoccelus typus 



Warbonnet Creek — Merycoidodon a finis, 

 Phenacoccelus munroensis, Promeryco- 

 chcerus carrikeri 



White River — Eporeodon pacificus, Lep- 

 tauchenia decora, L. major, L. nitida, L. 

 sp., Promerycochcerus vantasselensis 



Nevada 



Humboldt County 



Virgin Valley — Merychyus sp., Tichole 

 tus petersoni, T . sp. 



New Mexico 



Santa Fe County 



Near Santa Cruz and Espahola — Metore- 

 odon novomexicanus 

 Near Santa Fe — M. medius 



North Dakota 



Stark County 



Near Dickinson — Eporeodon dickinsonen- 

 sis, E. major, Merycoidodon sp. 



Oregon 



Crook County 



Crooked River — Eporeodon longijrons, E. 

 pacificus 



Grant County 



Big Bottom — Eporeodon condoni, Mery- 

 cochcerus sp., ? Merycoidodon culbert- 

 sonii, M. sp. 



