112 



CENOZOIC MAMMAL HORIZONS 



LOWER MIOCENE. 



Arikaree formation (in part). 

 Promerycochoerus zone. 

 First phase — Harrison. Second phase. 



1. Fort Logan, Montana. 



2. Harrison, Nebraska. 



3. Monroe Creek, Nebraska. 



4. Lower Rosebud, South Dakota. 



5. Canyon Ferry, Montana. 



1. Laramie Peak, WyoTning. 



2. Upper Harrison, Nebraska. 



3. Upper Rosebud, South Dakota. 



4. Uppermost Martin Canyon, Colorado 



CARNIVORA. 



Canid^. 



Nothocyon gregorii Matthew 

 Nothocyon vuipinus Mat- 

 thew ^ 



Nothocyon annectens Peter- 

 son 



Nothocyon ? lemur Cope 



Cynodesmus thooides Scott.. 

 "Amphicyon" superbus Pe- 

 terson 



Mesocyon robustus Matthew 



Mesocyon sp 



Enhydrocyon eras sidens 

 Matthew 



? Brachypsalis simplicidens 

 Peterson 



Nimravus sectator Matthew 



Euhapsis brachyceps Peter- 

 son 



Euhapsis gaulodon Matthew 



Steneoflber ? pansus Cope. . . 



Steneofiber fossor Peterson.. 



Steneoflber ])arbouri Peter- 

 son 



Steneofiber simplicidensMat- 

 thew 



Steneofiber sciuroides Mat- 

 thew 



Steneofiber brachyceps Mat- 

 thew : . 



Steneofi]:)er montanus Scott . 



Meniscomys sp 



Entoptychus formosus Mat- 

 thew 



Entoptychus curtus Mat- 

 thew 



1. 



2. 



3. 





5. 







X 



X 

 X 





X 



X 



X 



X 







X 



X 



X 



X. 

 X 





Cynodesmus brachypus (Cope) , 

 Cynodesmus thoiiisoni Mat- 

 thew , 



Cynodesmus minor Matthew . . . 



Procyonid^. 



II Phlaocyon leucosteus Matthew.] 



MUSTELID^. 



Oligobunis lepidus Matthew 



Megalictis ferox Matthew 



.^1 urocyon l)revifacies Peterson . 



I I 



FELIDiE. 



i X I - 

 INSECTIVORA. 



Chrysochloriu^. 



li Arctoryctes terrenus Matthew.. | 

 RODENTIA. 

 Castorid^. 





X 



X 



X 

 X 







X 





X 

 X 





X 







X 





I X I 



APLODONTIIDiE. 



X I i 

 Geomyid^. 



Entoptychus formosus Matthew 

 Entoptychus curtus Matthew . . 



Heteromyid^. 



li Heteroni} ida" indet | 



I I X 



1 I X I 



1 X I 



