TABLE OF CONTENTS. 



Introduction i 



Occurrence and history o 



History of Quarry 13 2 



Plan of work o 



History of Quarry No. 1 24 



Plan of work 25 



Osteology of Stegosaurus 26 



Skull ^^ -^-^^' "^--!-^!!^^'!!"!!"!!!!'!!! 26 



Summary of cranial materials 26 



Known elements of the Stegosaurian skull 27 



Description _ 9y 



Basioccipital _ 28 



Exoccipital and Paraoccipital 28 



Supraoccipital 2q 



Basisphenoid and Presphenoid 30 



Alisphenoid oq 



Orbitosphenoid o t 



Parietal •. .,, 



Frontal on 



Prefrontal 09 



Postf rontal „2 



Postorbital 00 



Prootic „2 



Lachrymal 00 



Supraorbitals _ „■> 



Nasals 00 



Premaxillae 00 



Maxillae o^ 



Jugal 34 



Quadratojugal „ , 



Quadrate „_ 



Squamosal „_ 



Pterygoids „„ 



Palatines „„ 



Vomer „„ 



Epipterygoid „„ 



Measurements of skull „(■ 



Lower jaw „„ 



Dentary „„ 



Predentary „„ 



Splenial „„ 



Angular gg 



Surangular „„ 



Articular „„ 



Prearticular „q 



Coronoid. . . ^ ^ „„ 



Measurements of lower jaw ^^ 



sy°'d ;;;---;;;;;;;;;;;;;;;;;:;;:::::;;::;:: 40 



