TABLE OF CONTENTS VOL. VI. 
Page 
MAMMALIA OF THE SANTA CRUZ BEDS i 
PART I. TYPOTHERIA, by William J. Sinclair i 
INTRODUCTION i 
CLASSIFICATION OF THE SANTA CRUZ TYPOTHERIA . . 2 
Order TOXODONTIA 2 
Suborder TYPOTHERIA 2 
Relationships of the Santa Cruz Typotheria . . 7 
I. With the Toxodonta ..... 7 
II. With Typotherium ..... 9 
III. With the Rodentia ..... 10 
IV. With the Hyracoidea . . . . . 1 1 
Conclusions 13 
Synonymy 13 
Interatheriim: 13 
Protypotherium Amegh. ...... 13 
Inter atherium (Moreno) Amegh. .... 47 
HEGETOTHERIIDyE 67 
Hegetotherium Amegh. ...... 67 
Pachyrukhos Amegh. . . . . . . 85 
TYPOTHERIA INCERTAE SEDIS 98 
Protypotherium ....... 99 
Inter atherium . . . . . . . . 100 
Pachyrukhos . . . . . . . . 107 
Hegetotherium Amegh. . . . . . . 109 
Bibliography ............ 109 
PART II. TOXODONTA, by William B. Scott ...... 111 
Classification of the Toxodonta . . . . . . . . 116 
Nesodon Owen . . . . . . . . 118 
Adinotherium Amegh. ...... 200 
Phobereotherium Amegh. ... ... 234 
Stenotephanos Amegh. ...... 235 
GENERA INCERTAE SEDIS 236 
Rhadinotherium Amegh. ...... 236 
Palceolithops Amegh. ...... 236 
Acrotherium Amegh. ...... 237 
Xotoprodon Amegh. ....... 237 
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