452 AQUILA CHRYSAETUS. 



lower mandible ; the cere ten-twelfths. The nostril el- 

 liptical, with two notches above. The upper mandible 

 concave within, with a central ridge. The palate with 

 two central soft papillate ridges ; a transverse papillate 

 flap on each side anterior to the narrow-elliptical aper- 

 ture of the internal nares, of which the anterior part is 

 linear, with minute papillae on the edges. The tongue 

 concave'^above, papillate, and sagittate behind, rounded, 

 slightly notched. The aperture of the ear elliptical, 

 five-twelfths in length. 



The tibia seven and a half inches long, the tarsus 

 four and a half. The first toe one inch and nine- 

 twelfths long, its claw two inches and nine-twelfths ; 

 the second toe one inch and nine-twelfths, its claw 

 two inches and two-twelfths ; the third toe two inches 

 and five-twelfths, its claw one inch and ten and a- 

 half twelfths ; the fourth toe one inch and eleven- 

 twelfths, its claw one inch and four-twelfths. All the 

 toes with four entire terminal scutella ; a pretty large 

 web between the third and fourth ; the sole broad, 

 roHgh, with roundish papillae. Claws all very broad 

 and flat beneath, laterally slightly concave ; that of the 

 middle toe directed inwards, and having an inner sharp 

 edge. The greatest diameter of the leg two inches 

 and ten-twelfths ; the extent of grasp between the tips 

 of the first and third claws eight inches. 



The entire length three feet one inch ; the extent of 

 the wings seven feet three inches ; wing from flexure 

 two feet two and a-half inches ; length of tail one foot 

 two inches. The fifth quill longest, the fourth next ; 

 but the third, fourth, fifth, and sixth, nearly equal ; the 

 first four and a half inches shorter than the second ; the 



