ILLUSTRATIONS 



Overpowering Curiosity of a Mountain Sheep 



Christmas at the Primates' House 



The Trap-Door Spider's Door and Biurrow 



Hanging Nest of the Baltimore Oriole 



Great Hanging Nests of the Crested Cacique . . . 



"Rajah," the Actor Orang-Utan 



Thumb-Print of an Orang-Utan 



The Lever That Our Orang-Utan Invented . . . 

 Portrait of a High-Caste Chimpanzee , • . . 

 The Gorilla With the Wonderful Mind .... 

 Tame Elephants Assisting in Tying a Wild Captive . 

 Wild Bears Quickly Recognize Protection .... 

 Alaskan Brown Bear, "Ivan," Begging for Food . . 



The Mystery of Death 



The Steady-Nerved and Courageous Mountain Goat 



Fortress of an Arizona Pack-Rat 



Wild Chipmunks Respond to Man's Protection . . 



An Opossxim Feigning Death 



Migration of the Golden Plover. (Map) .... 

 Remarkable Village Nests of the Sociable Weaver Bird 

 Spotted Bower-Bird, at Work on Its Unfinished Bower 



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