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Plate XIII. 



a. An emai-^inated primary quill. 



b. A sinuated primary quill. 



1. Under -wing- coverts , or "lining of -wing'.' 

 2 . Under primary- coverts. 



3. Spurious primary. 



4. Axillars. 



5. "Bend of wing" or carpal joint. 



6. Carpo -metacarpal joint. 



