56 THE DESEADO FORMATION OF PATAGONIA 



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Fig. 24. Comparative series of upper dentitions of Deseado and Santa Cruz Typotheria; a, Archaeohyrax patagonicus; 

 b, Hegetotherium mirabile; c, Prosotherium garzoni; d. Pachrukhos moyani: e. Archaeophylus patrius; /, Interatherium 

 extensum; g Protypotherium australe; h, Argyrohyrax proavus; i, Eutrachytherus spegazzinianus all natural size. 



