80 



NORTHERN ZOOLOGY. 



ings of any note. They differ from each other, however, in the relative lengths 

 of the quill feathers. 



No. 2, of the same dimensions with the preceding (No. 1), and, therefore, most 

 probably of the same sex, has the third quill feather equal to the sixth, and the 

 second to the seventh, the fourth and fifth being the longest, as above. 



No. 3, twenty-six inches long, had the quill feathers of the same relative lengths 

 with No. 1. 



No. 4, also twenty-six inches long, corresponded in the quill feathers with No. 2. 



No. 5, which was the largest, being twenty-seven inches long, had the fourth 

 quill feather two lines shorter than the fifth, the third perceptibly shorter than the 

 sixth, and the second an inch and a half shorter than the third. In all the speci- 

 mens the first quill feather was a little shorter than the ninth, and between four 

 and four inches and a half shorter than the fourth or fifth. 



The ear and operculum of the Great Cinereous Owl, showing the roots or quills only of the feathers. One of the 

 ruff feathers of its natural size. The bill of the same, with merely a few of the basal feathers, that the form of the 

 nostrils may be seen. 



