CLASSIFICATION OF VERTEBRATA 22 



6. Sub-CLASS DINOSAUEIA, Pictet 



Stereospondylous. Quadrate fixed. Eibs with capitulum 

 and tuberculum. Limbs terrestrial. With distal ischiadic syn- 

 desmosis. Ilium horizontally elongated. With sternum. 



Upper Triassic, Jurassic, and Cretaceous. 



1. Order Sauropoda, Marsh. Pubes simple, with symphysis. 

 Premaxilla with teeth. Fore- and hind-limbs pentadactyle, 

 plantigrade. 



Atlantosaurus, Brontosaurus, Morosaurus, Diplodocus : 

 mostly gigantic beasts of the Upper Jurassic of Wyoming. 

 Ornithopsis. Wealden, England. 



2. Order Theropoda, Marsh. Pubes simple, with symphysis. 

 Premaxilla with teeth. Carnivorous. Fore-limbs shorter than 

 hind-limbs. Metatarsals elongated. Digitigrade. 



Anchisaurus. Upper Trias, Connecticut. . 

 Brontozoum (Ornithichnites). Connecticut. 

 Zanclodon. Keuper, Wuerttemberg. 

 Megalosaurus. Oolite, Europe and Colorado. 

 Allosaurus, Ceratosaurus, Coelurus, Hallopus. Upper 



Jurassic, U.S.A. 

 Compsognathus. Oolite, Bavaria ; hind -limb almost 



typically avine. 



3. Order Orthopoda, Cope. Each pubis consisting of an 

 anterior (prepubis) and a posterior (postpubis) arm, without 

 symphyses. 



Premaxilla without teeth, and with a predentary 

 edentulous piece. Herbivorous. 



1. Sub-order STEGOSAUEI, Marsh. Plantigrade. With 

 dermal armour. 



Scelidosaurus. Lias to Chalk, England. 

 Stegosaurus. Jurassic, North America. 



2. Sub-order OENITHOPODA, Marsh. Fore-limbs much 

 shorter than hind -limbs, but stout and with five fingers. 

 Hind-limbs elongated, digitigrade. 



Camptosaurus and Laosaurus. Upper Jurassic, U.S.A. 

 Hypselophodon. Wealden, England. 

 Iguanodon. Wealden, Europe. 



