xii ILLUSTRATIONS 



PAGE 



The Manatee 161 



The Three-Banded Armadillo, and Six-Banded Armadillo . . . 167 



The Great Ant-Eater and the Tamandua* 173 



Murine Opossum and Young . . 193 



Why the White Mountain Sheep are Fast Disappearing! . . . 211 



Landscape Chart of the Orders of North American Birds . . . 253 



Cliff Swallow and Nests 295 



American Magpie 321 



TEXT ILLUSTRATIONS 



PAGE 



Skeleton of an Adult Male American Bison 6 



American Bison in the New York Zoological Park 7 



The Wichita National Bison Herd, Oklahoma 12 



Range of the Musk-Ox 19 



Distribution of Mountain Sheep in North America in 1914 ... 27 



Head of White Mountain Sheep 31 



Wide-Horned White Mountain Sheep 33 



Skeleton of an Adult Male Mountain Goat 45 



Distribution of the White Mountain Goat s 47 



Prong-Horned Antelope 51 



Isolated Herds of Prong-Horned Antelope 53 



"Do Elk Shed Their Antlers?" 58 



"Do Elk Shed Their Antlers?" 59 



