LIST OF FIGURES IN TEXT. 



Life-mask of President Lincoln and cane used by President Lincoln 



Platyclymenia ainericana Raymond 



PlatyclyDienia polyplcura Raymond 



Prolobitcs simplex Raymond 



Tornoceras crebriseptian Raymond 



Tornoceras sp. 



Tornoceras doiiglassi Raymond 



Lateral view of skull of Procanicliis madisonius Douglass 



Palatal view of skull of Procanielus madisonius Douglass . 



Powder-horn carved by William McKenzie, while in the garrison 



Fort Piit, 1783 



Dromomeryx borealis (Cope). Skull ..... 



Dromomeryx borealis (Cope). Portion of brain- case from aljove 

 Dromomeryx borealis (Cope). Portion of brain-case from below 



of 



140 

 150 



151 

 153 

 154 

 154 



155 

 164 



164 



434 

 462 



471 

 471 



VII 



