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OF 



LOUIS AGASSIZ, 



TO WHOSE INFLUENCE AS TEACHER, EXPOUNDER, AND INVESTIGATOR, NATURAL 

 HISTORY IN AMERICA IS SO DEEPLY INDEBTED, 



AND WHO FIRST INSPIRED AND ENCOURAGED US IN OUR EARLIER STUDIES, 



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IS GRATEFULLY DEDICATED BY 



CHARLES WACHSMUTH. 

 FRANK SPRINGER. 



