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THE NEW 



EVOLUTION 



ZOOGENESIS 



By 

 AUSTIN H. CLARK 



U. S. National Museum 



Author of Animals of Land and Sea, The Birds of 



THE Southern Lesser Antilles, The Crinoids 



OF the Indian Ocean, Die Crinoiden 



der Antarktis, etc. 



BALTIMORE 



THE WLLLIAMS & WELKINS COMPANY 



1930 



