CONTENTS. 



Sciuridpe, .... 



335 



Ilystricidcc, 



ISCHYEOMYS, 



« 



Hysteix, 



typus, 

 Castorid«, 



338 



" venustus, 



Pal^ocastoe, . 



" nebrascensis, 

 Castoe, 



ti 



341 



INSECTIVORA, . 



Leptictis, 



" tortus, . 



it 



I-Iaydeni 



Muridie, .... 



342 



ICTOPS, . 



EUMYS, .... 



tt 



" dakotensis, 



" elegans. 



tt 





343 



345 



.351 



Concluding Remarks, .... 



Synopsis of Extinct Mammalia of North America, 

 Index, ...... 



References to the Plates, 



354 

 .363 

 447 

 455 



