VI TABLE OF CONTENTS. 



Osteology of Stegosaurus — Continued . 



External openings in the skull — Page. 



Supratemporal f oss.\e 40 



Infratemporal fossae 40 



Orbital cavities 41 



Anterior nares 41 



Posterior nares 41 



Palatine vacuities 41 



Foramen magnum 41 



Lesser foramina 41 



Brain 43 



Teeth 44 



Vertebral column ■ 45 



Atlas 45 



Axis 47 



Cervicals posterior to the axis 47 



Dorsal vertebrae 49 



Dorso-sacral 52 



Sacrum 53 



Caudo-sacral .' . . .' 57 



Caudal vertebrae 58 



Chevrons '. 61 



•Ribs .■ 63 



Cervical ribs 63 



Dorsal ribs 63 



Sternal bones 65 



Shoulder girdle 66 



Scapula 66 



Coracoid : 67 



Fore limb and foot 68 



Humerus . . 68 



Ulna 69 



Radius 69 



Fore foot 70 



Carpus 70 



Radiale 71 



Intermedium 71 



Ulnare 72 



Pisiform . 72 



Metacarpus 72 



Phalanges 75 



Pelvis 77 



Ilium 77 



Pubis 78 



Ischium 79 



Hind limb and foot : 80 



Femur 80 



Tibia 84 



Fibula 85 



Hind foot . 86 



Astragalus . ' 86 



Calcaneum 87 



Metatarsus 87 



Phalanges 89 



Dermal armor 91 



Dermal ossicles 91 



