Xii COKTEXTS. 



Pagt 

 Okdee III. — Sauhia — Lizards 265 



Characteristics — Numbers — Use as Food — Habits 265 



Iguana — Grecko — Chameleon 266 



Change of Colour in the Chameleon, how explained 267 



British Lizards — Anecdote of a Sardinian Species 268 



Crocodile — Its Utility — Errors respecting it 269 



Extinct Species of British Saurian Reptiles 271 



Okdek IV. — Testuddiata — Tortoises 273 



How distinguished — Structure of the Shield or Covering ... 274 



Number of Species — Their Classification 275 



Hawk-billed Turtle — Ease and Celerity of its Movements 275 



Habits of Different Species 276 



Longevity — Tortoises of the Galipagos Archipelago 277 



Gigantic Fossil Tortoise of India 278 



Former abundance of Tortoises in the British Seas — 279 



A Tortoise in Love 280 



CLASS III.— A VES— BIRDS. 



Definition — Power of Flight 281 



Peculiarities observable in the Structure of the Skeleton 282 



Circulation of the Blood, and its high Temperature 286 



Covering — Variety in the Plumage 287 



Long-continued Power of Flight — The Frigate Bird 289 



Buoyancy of the Gannet — Its great Abundance in some Localities 291 



Impetus of its Descent — Mechanism for this Purpose 292 



Moulting — Meaning of the Term — Explanation of the Phenomenon 293 



Digestive Organs — The Bill — Crop — Gizzard 294 



Sense of Sight 297 



Sense of Smell — Turkey — Buzzard — Condor 298 



Removal of decaying Animal Matter 300 



Bligration — Power of the Migratory Instinct 301 



Affection of Birds for their Young 303 



Nests — Examples of the Variety in their Structure 304 



Organs of Voice 306 



Geographical Distribution — Classification 308 



Order I. — Raptores — Birds op Prey 311 



VuLTUKES. — Griffon and Egj-ptian Vulture 312 



The Condor — its Size and Flight — The Lammergeytr 313 



Falcons. — 'Wliat birds are included in the family Falconida 314 



Eagles — The Spotted— The Sea Eagle 315 



The (Jolden Eaglo — its Habits 316 



The true Falcons — The Peregrine 319 



Fakonrj' — Terms Employed — Training of the Falcons 320 



Their Former Value — Flight— Courage 321 



