THE PERCEPTION OF SPACE 



683 



Figs. 825 to 827. — The Foveal Arrangements of Birds (Casey Wood). 



Fig. 825. — The titmouse. To show the 



laterally directed eyes with central 



fove£e (/) for panoramic vision (visual 

 axes, GH, GI; p, pecten) 



Fig. 826. — The swallow. To show the 

 laterally directed eyes with central 

 foveas for panoramic vision (visual axes, 

 NI, NH) and temporal fovete for bin- 

 ocular vision (visual axes, TL, TR). 



Fig. 827. — The owl. To show the frontallj- directed eyes with temporal 

 fovea? for binocular vision (visual axes, TF; P, pecten). 



