516 MUSEO NACIONAL DE BUENOS AIRES. 



FiG. Paq. 



Stereohippus tarijensis 



Parahipparion meridionalis 



Hipparion gracile 



Hipparion isonessum 



Hipparion calamarium 



Neohippariou Sinclairl 



Pseudhiiiparion i-etrusum 



Protohippus inirabilis 



Nesohippidiou angulatus 



Hippliaplus aiitiquus. 



Hippidion scalaris ... 

 Equus insulatus . . . . 



Equus gracilis . . 



Equus curvidens . . . . 



Equus Muñizi 



Equus rectidens 



Equus caballus ...... 



