476 STllIX FLAMMEA. 



oval, two inches and three-eighths in length, one inch and 

 three-eighths in breadth ; the central tendons five-eighths by 

 five-twelfths, and six-eighths by five-twelfths ; pylorus very 

 narrow, with a roundish knob projecting from its thickened 

 margin ; intestine nineteen feet long, in the duodenal part five- 

 twelfths in width, at the smallest near the coeca two and a half 

 twelfths ; the coeca two inches and two-twelfths in length, for 

 one inch of the uniform width of two-twelfths, then enlarged 

 into an obovate sac, five-twelfths in its greatest width ; the 

 rectum two inches and a half long, with a large globular 

 cloaca. 



In another individual shot in April 1836, the tongue was 

 nine-twelfths long, the oesophagus four inches and a half, ten 

 twelfths in width ; the stomach two inches in diameter ; the 

 intestine twenty-two inches long ; the coeca two inches and a 

 quarter, the rectum two inches. 



Length to end of tail 1.5 inches ; to end of wings I5h ; ex- 



O ^ CD - ^ 



tent of wings 38; wing from flexure 11 f ; tail 5 ; bill along 

 the ridge I5 ; along the edge of lower mandible 1^]- ; width 

 of mouth 1 ; tarsus 2/^ ; hind toe |%, its claw f-g ; second 

 toe Ij, its claw \h ; third toe lj\, its claw -}!? ; fourth toe 

 ^%, its claw i§. 



Variations. — In individuals apparently adult, some slight 

 differences are observed in the colouring. The bill is ivory- 

 white, or tinged with yellow, or flesh-colour ; the facial disks 

 rarely without a reddish patch, which however varies in size ; 

 the ruff" sometimes entirely white, sometimes tipped with buff 

 or yellowish -brown, its lower part often dark brown or dusky. 

 The upper parts are more or less grey or yellow, and the lower 

 sometimes pure white, sometimes tinged with yellow, but 

 usually marked with small dusky spots. 



Changes of Plumage. — Toward the period of moult, there 

 is less grey on the upper parts, and the spots on the lower are 

 fewer, the tips of the feathers having been partially abraded. 



Habits. — If we give " a local habitation ■" to the White Owl, 



