1% I 



K.K I 



L J 



-if 



LOXOEAMD-OWL ( j|*<0 OftU). 



r,.-. :.. 



-Of 

 Mt 



BARN-OWL 



JUfU. 

 (%rim a/uo). 



I .,-. :.. 



s,-. 



LM'I OWL. 



Heads of Tkrioiu Owls to show the form of the external aperture of the Ear. 



B.C. = Blind-cavity. 



D-Diac feathers. 



K-Eye. 

 L J. - Lower Jaw. 



M. E. - External ear aperture. 

 Op. * Operculum. 

 8-Skull. 



