CONTENTS. OF VOL: II. XX1X 
Page. 
Periodical Migration. Summer birds of passage. Win- 
ter birds of passage. Places whence they come 
and te which they return. Polar and Equatorial 
migration. Influenced by the zones of equal tem- 
perature, : : : : é ‘ 
Torpidity. In Quadrupeds, confined to the unguicu- 
lata. Retire to a place of safety. Assume the po- 
sition of sleep. Are very fat. Suffer, when torpid, 
a diminution of temperature. Respiration slow. 
Circulation slow. Diminished irritability. Power 
of digestion weak. Weight diminishes. Causes of 
torpidity, a reduced temperature, confined atmos- 
phere, state of the constitution. Reviviscence. Tor- 
pidity of birds. Submersion of swallows. Torpi- 
dity of cold-blooded animals. Quiescence, 
2. Food. Provisions against the occurrence of want 
at particular seasons. Migration. Storing, 
3. Situation. Land and water, Amphibious, 
4. Foes. Rapacious animals. Man, 
Revolutions which have taken place in the Animal 
Kingdom. 
Remains of animals found in rocks. Errors, their ori- 
gin. No evidence that these remains have been 
brought from other countries. Laws influencing 
Geographical distribution have always operated. 
The oldest relics not always belonging to the sim- 
plest animals, \ ; ; , 
Origin of these revolutions. Influence of the chace. 
Detrition of mountains, and upfilling of lakes. In- 
crease of dry land. Changes of temperature. Pe- 
culiar co-existing characters of the state of the stra- 
ta, and the kind of putrefactions which they con- 
tain, 
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