TABLE OF BRITISH STRATA WITH THEIR NORTH AMERICAN EQUIVALENTS, 



AND A LIST OF THE VERTEBRATE FOSSILS WHICH ARE FOUND 



IN THEM IN THE UNITED STATES. 



Tapir, Peccary, Bison. 



Bos, Equus, Tapir us, Dicolyles,Megatherium,3Iylodon. 



Equus Beds. 

 Pliohippus Beds. 



Equus, Tapirus, Elephas. 



( Pliohippus, Tapirarus, Mastodon, Procamelus, 

 \ Aceratherium, Bos, Morotherium, Platygonus. 



Miohippus Beds. 

 Oreodon Beds. 

 BrontotheriumBeds 



Diplacodon Beds. 

 Dinoceras Beds. 

 Heliobatis Beds. 

 Coryphodon Beds. 



Laramie Scries, or 

 Ceratops Beds. 



Miohippus, Dicer atherium, Thinohyus, Protoceras. 

 ( Oreodon, Eporeodon, Hyamodon, Moropus, Jctops, 

 \ Hyracodon, Agriochoerus, Colodon, Leplochozrus. 

 5 Brontotherium, Brontops, Allops, Titanops, Titano- 

 \ therium, Mesohippus, Ancodus, Entelodon. 



Diplacodon, Epihippus, Amynodon, Eomeryx. 

 ( Dinoceras, Tinoceras, Uintatherium, Palceosyops, 

 I Orohippus, Eyrachyus, Colonoceras, Eomucodon. 

 Heliobatis, Amia, Lepidosteus, Asineops, Clupea. 

 5 Coryphodo7i,Eohippm,Eohyus.B~yraeops,Pnrahyu8 

 \ Lemurs, Ungulates, Tillodouts, Rodents, Serpents. 



Ceratops, Triceratops, Claosaurus, Ornithomimus. 

 Mammals, Cimolomys, Dipriodon, Selenacodon, 

 Nanomyops, Stagodo'n. Birus, Cimolopteryx. 



Fox Hills Group. 



Colorado Series, or 

 Pteranodon Beds. 



Dakota Group. 



Birds with Teeih.Besperornis, lchtliyornis, Apatornis. 

 Mosasaurs, Edestosaurus, Lestosaurus, Tylosaurus. 

 Pterodactyls, Pteranodon. Plesiosaurs, Turtles. 



Atlantosaurus Reds 

 Baptanodon Beds. 

 Hallopus Beds. 



Otozoum, or 

 Coun. River, Beds. 



Nothodon Beds. 



\ Dinosaurs, Bronwsaurus, Morosaurus, Diplodocus, 

 I Stegosaurus,C'a»rptosaarus, Ceratoscnirus. Mam- 

 (. mals, Dryolestes, titylacodon, Tinodon, Ctenacodon. 



First Mammals, Dromatherium. First Dinosaurs, 

 Anchisaurus, Ammosaums, Bathygnathus, Cle.psy- 

 saurus. Many footprints. Crocodiles, Belodon, 

 Fishes, Catopterus, Ischyplerus, Ptycholepis. 



Reptiles, Nothodon, Eryops, Sphe?iacodon. 



Coal Measures, or 

 Eosaurus Beds. 



Subcarboniferous, 

 orSauropusBeds. 



Dinickthys Beds. 

 Lower Devonian 



Upper Silurian. 



Lower Silurian. 



Primordial. 



Huronian. 



Archaean. Laurentian. 



First Reptiles (?) Eosaurus. Amphibians, Baphetes, 

 Dendrerpeton, Bylonomus, Pelion, Footprints, 

 Anthracopus, Allopus, Baropus, Dromopus, Eylopus. 

 Limnopus, Nasopus. 



First known Amphibians (Labyrinthodonts). 

 Footprints, Sauropus, Thenaropus. 



Dinichthys, Acanthodes, Bothriolepis, Chirolepis, 

 Cladodus, Dipterus, Titanichthys. 



First known Fishes. 



No Vertebrates known. 



[To illustrate Prof. Marsh's paper on European Dinosaurs.] 



