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Ordo XXI.— STRUTHIONES. 



Fam. I.— KIIElBvE. 



Genus I. — Rtiea. 



1 americana, Lath. ex Brasil int. rep. Arg. et Patagonia. 



2 macrorhyncha, Sclater, ex Am. merid. loc. ign. 



Genus II. — Ptekocxehis. 

 1 darmni (Gould) ex Patagonia. 



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