PLATE 3 



EXPLANATION OF FIGURES 



4 Right lateral view of a nestling hoatzin (Opisthocomus cristatus) ; wings 

 raised. Alcoholic specimen; two-thirds natural size. Same lot and history as the 

 specimens in plates 1 and 2. 



5 Direct left lateral view of the head of a young hoatzin (Opisthocomus 

 cristatus); two-thirds natural size. Alcoholic specimen. Same lot and history 

 as those figured on plates 1 and 2. 



6 Feet of a nestling hoatzin (Opisthocomus cristatus) ; two-thirds natural 

 size. Alcoholic. Same lot and history as those figured on plates 1 and 2. These 

 feet are the same as the ones shown in figure 4 of this plate, seen upon left lateral 

 aspect instead of upon the right. 



612 



