GEOLOGICAL ANCESTORS 



OF THE 



BROOK TROIT 



AND 



RECENT 5AIBLING FORM5 

 FROM WHICH IT EVOLVED 



JOHN D. QUACKLNBO5, A. M 



Emeritus Professor in Columbia University 

 Fellow of the New York Academy of Medicine, 

 and of the New Hampshire Medical Society 

 Member of the New York Medical Associ- 

 ation, of the American Medical As- 

 sociation, of the American Asso- 

 ciation for the Advancement 

 of Science 



ILLUSTRATED 



PUBLISHED FOR THE ANGLERS' CLUB OF NEW YORK 



BY 

 TOBIAS A. WRIGHT 



No. 150 BLEECKER STREET, NEW YORK 

 1916 



