•'^10 DR. H. GADOW ON THE SPECIES OF RHEA. [Mar. 17, 



Fig. 1. 



Skull of Eh. americana, | natural size. Upper surface. 



Fi>. 2. Fie. 3. 



Fig. 2. Skull of Bh. macrorhi/ncJia. | natural size. Upper surface. 

 Fig. 3. Skull of Bh. darwini, | natui al .size. Upper surface. 



