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io | 
THE ANATOMY OF BIRDS. — PNEUMATOLOGY. 
(From Amer. Nat.) 
reduced. 
? 
Fic. 99. — Coiling of the windpipe in the sternum of Grus americana ; 
Fic. 100. — Coiling of the windpipe in the sternum of Grus canadensis; reduced. (From Amer. Nat.) 
