TRANSACTIONS OF SECTION C. 



735 







.'--. -■ y _' _ 



T:iassie. 



Carboniferous 



: '-- "l~-^9^1;.'~ . 



Recent. 

 Quaternary. 



riiocene. 



Miocene. 



Eocene. 



Kquus Beds. 

 Phohippus Beds. 



Mioliippus Bods. 

 Oreodon Beds. 

 BrontothcriumEeds 



Tapir. Peccary, Bison. Llamn. 

 Boa, Eguue, Megatherium, Mylodon. 



Equus, Tapirus Elephas. 



fPliohippnt, Tapiramw, Mastodon, Aeeratlte- 

 i run/*. /;<<--. ilorotheruan. 



Mioliippus, Diceratherittm, Thinohyw. 



fOremlon, Eporeodon. ITi/anodon, Ilyracodon. 

 I Edentates (.iforopus). 



Brontuthcrium, Mcnodus, Mesohippus. 



Diplacodon Beds. 

 Dinoceras Beds. 



Green River, or 



Heliobatis, Beds. 

 Corvphodon Beds. 



Diplacodon, EpUUppus, A tnt/nodon. 

 (XKnoceraM, Tiuocertu, Uintatherium, Potato- 

 \ syops, Oi'ohippus, Ilelaletes, Cotonocerat, 



Heliobatis, Amia, Zepidosteus, 



(( 'orjmhodon, Eohippus, 

 I Rodent*. Serpents. 



Lemurs, Tillodonts 



Cretaceous. 



Silurian. 



Cambrian. 



Archaean. 



Laramie Series, or \ Ba a n «mr m ,Drypto« l um>a^lap>% • 



Hadrosaurus Beds. | 



Fox Hill group. 



Colorado SorieS, or Birds with Teeth (Odontornfr/tes), Hesperomia 



f,, , -r, a Ir/tt/uinriti '. 



Pternnodon Heds. Mosasaurs, Pterodactyls. Plesiosaurs. 



Dakota Group. 



Aflintnsinrnq "Rp.lc; 'Dinosaurs, Brontosauna, Dipladocw, Steyo- 

 'I mitna. Alloaaurw,. Turtles. Crocodiles. 

 Mammals iJJryulestes, Stylacodon, Tinodon, 

 t 'tenacodon I. 



Baptanodon Beds. 



Otozoum, or 

 Coun. River, Beds. 



Nothodon Beds. 



First Mammals CDromath&rium I. 

 Dinosaur Foot-priuts, A mphisaurut. 



Reptiles (JTothodon, Sphenacndori). 



Coal Measures, or FirstBentilesC'JfiwaiinKs. 

 Eosaurus Beds. 



Sllbcarboniferous. First known Amphibians (Labyrinthodonts), 



or Sauropus Beds. | Sauropia, 



Dinichthys Beds. 

 Schoharie Grit. 



Upper Silurian. 



Lower Silurian. 



Primordial. 



Huron ian. 



Lanrentiai 



Dinichthiis. 



First known Fishes. 



No Vertebrates known. 



Section to illustrate Vertebrate Life in America. 



