TABLE OF CONTENTS. 



Kamily CASTORID^ 487-456 



Oemis Caator 4:<i!-4r>l 



Caitor fiter 433-451 



Synonymy 433-434 



Description 434-436 



BelatioD of the American and Old W orld Beavera 437-445 



BemorkBon synonymy and nomenclataro 444-445 



Geograpbical distribntion 445-446 



Fossil remains 44C-446 



Measurements of skalls 447-447 



List of specimens examlnc<l 448-440 



Oonns EOCASTOR 449-440 



EwKxttor tortiu 440-451 



Oenns Stkneofibbr 451-461 



Stentofthernebra»<!»nfi» 451-463 



SImeofiber pantm 453-453 



Bibliographical appendix 454-464 



4S9 



