Fig. 107. Prong-Buck as commonly 

 seen by all animals whose eyes are on a 

 lower level than its rump. (This, of course, 

 includes the Prong-Buck's terrestrial ene- 

 mies, such as wolves and cougars— not to 

 speak of the beast'sown young,wbieh have 

 been supposed to use their parent's snow- 

 white stern as a "banner" to follow in 

 flight.) 



In all these photographs from a stuffed 

 beast, the rest of the animal is much more 

 conspicuous against the ground than it 

 would be in nature. 



Photographed from a stuffed skin. 

 Soiled rump-mark covered with white rabbit skiu 



Fig. 108. Prong-Buck's obliterative 

 rump-mark seen against the ground, as 

 men see it, their eyes being on a higher 

 level. 



Photographed from a stuffed skin. 

 Soiled rump-mark covered with white rabbit skin. 



Fig. 109. The same as Fig. 107, but with the 

 Prong-Buck's legs and the landscape shaded 

 more nearly into one flat 'tone,' such as the 

 beholder would really see in the night. Body 

 and legs, not coming against sky, would, at 

 night, be invisible, or very nearly so. 



Nature, in such cases as' the Hare's and Prong- 

 Buck's, evidently 'obliterates' with white exactly 

 as much of the animal as his carnivorous enemies, 

 when close upon him, would see against the sky, 

 to guide their final leap. 



Retouched photograph of stuffed skin. 



Fig, 110. Prong-Buck against the sky, presenting a con- 

 spicuous silhouette of all but the rump-mark, which would 

 show were it of any darker lone than white. 



Soiled rump mark covered with white rabbit skin. 

 Photograph of stuffed skin. 

 (Except where the contrary is expressly stated, all our photographs are 

 absolutely unretouched.) 



