LOWER TEETH OF TYPOTHERIA 57 



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ig. 25. Comparative series of lower dentitions of Deseado and Santa Cruz Typotheria; a, Archaeohyrax patagonicus; b, 

 ietotherium mirabile; c, Prosotherium garzoni; J, Pachyrukhos moyani; e, Interatherium sp.; /, Protypotherium australe; 

 'lagiarthrus clivus; h, Eutrachytherus spegazzinianus; i, Isoproedrium solitatium — all natural size. 



