CONTENTS 



Page 



Introduction 1 



Acknowledgments 2 



History of investigation 3 



Geographic and geologic occurrence 9 



Environment 13 



Classification 20 



The skeleton of Meniscothcrmm, with notes on Phenacodus, Hyopsodus, 



and other condylarths 22 



Skull 22 



Endocranial cast 35 



Mandible 39 



Dentition 41 



Vertebrae 45 



Scapula 50 



Humerus 51 



Radius 53 



Ulna 54 



Manus 55 



Pelvic girdle 64 



Femur 65 



Tibia 67 



Fibula 69 



Pes 70 



Summary of relationships 81 



References 90 



Explanation of plates 96 



