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0. C Marsh—American Jurassic Dinosaurs. 493 
Order DINOSAURIA, Owen. 
oe aoe Sauropopa (Lizard foot.) Herbivorous. 
Family Atlantosauride. 
Genera Atlantosaurus, Apatosaurus, Brontosaurus, Dip- 
lodocus, and Morosaurus. 
Suborder ee (Plated lizard.) Herbivorous. 
Feet plan tigrade, ungulate; five digits in manus and pes. 
Pubes free in front. Post- -pubis present. 
Vertebre and limb bones solid. 
Family Si dabei cay 
Genus Stegosauru 
Suborder Ornrrnoropa (Bird foot.) Herbivorous. 
Feet digitigrade; four functional digits in manus and 
three in pes. 
Pubes free in front. Post-pubis present. 
Vertebree solid: limb bones hollow. 
Family Canepa. 
Genera Camptonotus, Diracodon, Laosaurus, and Nano- 
Saurus. 
Suborder Turropopa (Beast foo Carnivorous. 
Vertebr more or less cavernous; lim i hollow. 
Family Adlosauride. 
Genera Allosaurus, Creosaurus, and Labrosaurus, 
Suborder Hatiopopa (Leaping foot.) Carnivorous ? 
Feet digitigrade, unguiculate ; three digits in pes. 
Metatarsals much elongated ; ‘caleaneum much produced 
ackward. 
Two vertebre in sacrum. Limb bones hollow. 
Family ror nt hte 
Genus Hallopu 
DINosavRIA ? 
sige ted — Nims tail.) Carnivorous ? 
Family Coluri 
Genus Cc ele 
Yale College, New Haven, April 15, 1881. 
