58 Philippine Journal of Science 



Plate V 



Thrasaetos harpy ja, harpy eagle; right lateral view of the trunk skeleton, 

 including bones of the shoulder girdle, reduced less than one- 

 half. Length of sternum in the specimen equals 13 centimeters. 

 No. 225806, United States National Museum collection; a 

 specimen from Brazil. 



Plate VI 



Pithecophaga jefferyi; trunk skeleton, seen upon direct dorsal view, with 

 the shoulder girdle in situ, reduced about one-third. The pygo- 

 style and the six caudal vertebrae preceding it have been removed. 



Plate VII 



Fig. 1. Thrasaetos harpyja; anterior aspect of the right tibiotarsus and 

 fibula, slightly reduced. From the same specimen as Plate V. 

 2. Thrasaetos harpyja; anconal aspect of left humerus, slightly 

 reduced. From the same specimen as Plate V. 



Plate VIII 



Fig. 1. Aquila chrysa'etos, golden eagle; anconal aspect of right humerus. 

 No. 18802, United States National Museum collection. Length 

 of bone, about 18.2 centimeters. 



2. Thrasaetos harpyja; anconal aspect of right humerus. From the 



same specimen as Plate V. 



3. Pithecophaga jefferyi; anconal aspect of right humerus, reduced 



about one-third. Bone in life measures about 19.7 centimeters in 

 length. 



Plate IX 



Fig. 1. Pithecophaga jefferyi; left femur, posterior aspect. Extreme 

 length of bone in specimen, about 13 centimeters. Bone entirely 

 pneumatic. 



2. Pithecophaga jefferyi; right tarsometatarsus and fibula, viewed 



on direct anterior aspect. Length of tarsometatarsus in speci- 

 men, about 23 centimeters. 



3. Pithecophaga jefferyi; left tarsometatarsus and fibula, viewed on 



direct outer aspect. 



Plate X 



Pithecophaga jefferyi; skeleton of the right foot, mesial aspect, natural 

 ' size. 



Plate XI 



Fig. 1. Haliseetus leucocephalus ; skeleton of right foot, inner aspect, 

 natural size. No. 19278, United States National Museum 

 collection. 

 2. Halissetus leucocephalus ; skeleton of left foot, outer aspect, natural 

 size. The same bird as in fig. 1. 



