1 68 SHUFELDT. 



EXPLANATION OF PLATE XVL 



Fig. 9. Skull of Asia accipitrinus ; right lateral aspect, with mandible attached ; 

 natural size. 



Fig. to. Head of Asia accipitrinus ; left lateral view, with feathers removed 

 and showing ear-opening ; natural size. 



Fig. II. Head of Asio accipitrinus ; right lateral view, with feathers removed 

 and showing ear-opening ; natural size. 



Fig. 12. Skull of Asio otus ; left lateral aspect, with mandible attached; 

 natural size. 



