Illustration. 
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THE BIRD WORLD. 
1. Concave-casqued Hornbills. 
3. Elate Hornbill. 
5. Subcylindical Hornbill. 
. ~ f 
2. Wreathed Hornbill. 
4. Black Hornbill. 
6. Ground Hornbill. 
Copyright by W. S. Bcrridg 
