GLIRES OF THE SANTA CRUZ BEDS. 



385 



tive number of the hystricomorph rodents of South America in Santa 

 Cruz and in recent times. 



Recent. 



Ctenomys. 



Aconaemys. 



Spalacopus. 



Octodon. 



Abrocoma. 



Dactylomys. 



Thrinacodus. 



Kannabateomys. 



Loncheres. 



Thricomys. 



Cercomys. 



Carterodon. 



Mesomys. 



Echimys. 



Myocastor. 

 Capromys. 

 Plagiodontia. 



Coendou. 

 Chaetomys. 



Wanting. 



Viscaccia. 

 Chinchilla. 



Santa Cruz. 



I. OCTODONTID/E. 



i . Octodontince. 



Not found. 



2. Loncherince. 



Stichomys. 



Adelphomys. 



Gyrignophus. 



Spaniomys. 



Graphimys. 



3. Capromyince. 



Neoreomys. 

 Scleromys. 

 Lomomys. 

 Olenopsis. 



II. ERETHIZONTID/E. 



1. Erethizontince. 



2. Chcetomyince. 



3. Acaremyince. 



III. CHINCHILLID^E. 



Steiromys. 

 Not found. 



Acaremys. 

 Sciamys. 



Prolagostomus. 

 Pliolagostomus. 



