A 
MONOGRAPH 
OF 
THE TROGONIDiE, 
FAMILY OF TROGONS. 
JOHN GOULD, F.L.S., &c. 
LONDON: 
PRINTED BY RICHARD AND JOHN E. TAYLOR, RED LION COURT, FLEET STREET. 
PUBLISHED BY THE AUTHOR, 20 BROAD STREET, GOLDEN SQUARE. 
1838. 
