TABLE OF CONTENTS 



General Characters of Mammals 13 



History and Distribution of Mammals 14 



The Hair of Mammals 23 



The Color and Color Patterns of Mammals 25 



The Habitats of Mammals 28 



The Defenses of Mammals 30 



Interrelationships Among Mammals 32 



Hibernation of Mammals 36 



Conservation of Wild Life 39 



The Teeth of Mammals 41 



The Mammalian Skeleton 43 



The Classification of Mammals 52 



The Orders of Mammals with keys to identification 55 



The Families of Mammals with keys to identification 56 



A Classified List of Pennsylvania Mammals 58 



Detailed Discussions of Pennsvlvania Mammals 63 



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