PLATE V. 



Phases of the wing-stroke, continued from Plate IV. A : Last phase 

 of the down-stroke. B : Beginning of the upstroke. C : Feathers 

 bent upward during the up-stroke {see Marey, Vol des Oiseaux, 

 p. 268, and Plate at end). D : Up-stroke continued. Continuation 

 of series on Plate VI. {See Chap. III.) 



To face p. 42.] 



