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Columiia HnttorrsitD Biological Scrira. 



. EDiTED BY 



HENRY FAIRFIELD OSBORN. 



1- FROM THE CREEKS TO DARWIN. 



By Henry Fairfield Osborn. Sc.D. Princeton. 



2. AMPHIOXUS AND THE ANCESTRY OF THE VERTEBRATES. 



By Arthur Willey. B.Sc. Lond. Univ. 



3. FISHES. LIVINC AND FOSSIL. An Introductory Study. 



By Bashford Dean. Ph.D. Columbia. 



4. THE CELL IN DEVELOPMENT AND INHERITANCE. 



By Edmund B. Wilson. Ph.D. J. H.U. 



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