| Giraffes, in Their Native African Haunts | Frontispiece |
| FACING PAGE |
| Starfish and Other Typical Life in a Tide Pool | 48 |
| Coral Formations of the Great Barrier Reef, Australia | 49 |
| Caterpillar Beginning to Weave Its Cocoon | 118 |
| Moth and Eggs | 119 |
| Caterpillar Protected by Form and Color Resembling the Twigs of a Tree | 148 |
| Sea Horse Protected by Form and Color Resembling the Marine Plants Among Which It Lives | 148 |
| Gila Monster, Feared, Though Its Bite Is Not Always Deadly to Man | 149 |
| Iguana, a Remarkable Lizard of the New World | 149 |
| Pelican, Notable for Its Throat Pouch | 248 |
| Peacock with Brilliant Tail Spread | 249 |
| Sacred Pheasant | 249 |
| Opossum Mother and Young | 272 |
| Anteater, Which Lives on Insects Caught in the Sticky Saliva on Its Long Tongue | 273 |
| Sloth, an Animal Which Keeps to Trees and Is Almost Helpless on the Ground | 273 |
| Wart Hog, One of the Ugliest Animals to See | 304 |
| Malay Tapir, Related to the Pig and the Rhinoceros | 304 |
| Markhor, an Asiatic Wild Goat | 305 |
| Mountain Sheep or Bighorn of the Rocky Mountains | 305 |
| The Kudu, or Striped Antelope, of Africa | 312 |
| Head of the Greater Sable Antelope | 312 |
| Head of Alaskan Moose | 312 |
| Axis, or Spotted Deer of the East Indies | 313 |
| American Deer with Horns in Velvet | 313 |
| Wolves, in Western North America | 336 |
| Bear in a Rocky Mountain Forest | 337 |
| Bat, with Young Bat in Each Pouch | 352 |
| Black Spider Monkey | 353 |
| Ruffed Lemur, Attractive by Its Coloring | 353 |
| Mandrill, Mouth Open to Snarl | 368 |
| Gorilla, Somewhat Thoughtful | 368 |
| Chimpanzees, Imitating Some of the Ways of Man | 369 |
