PLATE 27 



Gruiformes, continued 



All figures X 100 



Fig. 53. Otis tarda. 



a. Distal barbule from inner vane of remex. 



6. Proximal barbule from same. 



c. Distal barbule from back feather. 



d. Proximal barbule from back feather. 



Fig. 54. Psophia viridis. 



a. Distal barbule from inner vane of greater covert. 



6. Proximal barbule from outer vane of greater covert. 



c. Distal barbule from back feather. 



d. Proximal barbule from back feather. 



e. Barbule from iridescent green portion of outer vane of covert. 



Fig. 55. Eurypyga Tielias. 



a. Distal barbule from inner vane of remex. 



6. Proximal barbule from same. 



c. Distal barbule from back feather. 



d. Proximal barbule from back feather. 



Fig. 56. Cariama cristata. 



a. Distal barbule from back feather, near base of barb. 



6. Proximal barbule from same. 



[426] 



