PLATE 4 



EXPLANATION OF FIGURES 



7 Feet of a subadult hoatzin (Opisthocomus cristatus); two-thirds natural 

 size. Same lot and history as the specimens figured on plates 1 to 3. 



8 Right wing of a subadult hoatzin (Opisthocomus cristatus): two-thirds 

 natural size. Alcoholic. Different specimen from the one shown in figure 7 of 

 this plate. This wing is viewed directly from above, being spread out to show 

 pin-feathers. Terminal claws of the digits seen among the feathers. Same 

 history and lot as the specimens shown in figures 1 to 6 of plates 1 to 3. 



614 



