CHAPTER II.
- . . Page-
O f the Dispersion o f Plants, and o f the primary Habitations
o f individual Species,
S ection 1. Three hypotheses which have been maintained.on
this suhiecw^, * • y *,■ * v; •»•••••
Section 2. General facts connected with the distribution' of
the vegetable tribes—Distribution of the great
families or classes,^of the lesser families or
orders;—of genera—Lastly, of species.. . . . . , 21
Paragraph 1. Distribution of plants in
reference to the three great families-or
classes.. . . . . . . . . . . . . . . . . . . . . . . f,. 21
Paragraph 2. Distribution of orders or
families, and of genera................T . 7 . ’. 22
Paragraph 3. Analogy in the vegetation
Of parallel but distant regions1 ; . . . . . . . '25
Paragraph 4. Of speciCs-Common tb dis- •
tant countries-*-—Enumeration of botanical
provinces . . . . . i . . . . . . . . ........ .. 28
Section 3. Of the means provided by nature for%fee dispersion
of plants—Facts', relating, to the^mjgfa— •
tions and colonies of plants1 ................ . .7. - 34
Paragraph 1. Of the dispersion of plants
■,by human agency .. . . . . . ....................... 34
Paragraph. 2.„„,. By meails ofa-nimals . . . . 35
Paragraph, 3,. Diffusion of seeds by means
' of the atmosphere . . . . . . . . » *. i . ^ . 37-
Conservation of -seeds in soils .............. 38
■ Paragraph 4. Diffusion of plants by
water . . . . . . . . . . . . . . r . i . ; . • . . . ..t- 42
Section 4. ' Phenomena connected With th e ' Vegetation of
islands and of opposite coasts .. *............-;<• '43
SECTION 5. Recapitulation and conclusion . . . . . . . . . . . . * ' < 50
CHAPTER III.
O f ike Dispersion o f Animals.
Section. I. . Of the .lower orders of animals . . . . . . . . . . . . . . 54
Section 2. Of the dispersion of insects.................. ~ 5b
1 Page.
Section /3. -Of the dispersion of b ird s...................... 59
Section .4. Of the dispersion of marine animals........... 62
Section 5. Of the dispersion of mammifers and reptiles of
the land—Division of the earth into zoological
' provinces .......... 68
SECTittii 6. Peculiar characters of each of the great zoological
provinces .............................................. 71
. Paragraph 1. Terra Australis or Austral
Asia ..................................... 71
Paragraph - 2 . Intertropical and South
America............. ................... .............. 76
Paragraph 3. Intertropical and South
Africa . . . . . » . . . . . . . . ....... 80
Paragraph -4. Indian Archipelago . . . . 81
Paragraph 5, Polynesia . . . . . . . . . . . . 83
Section 7. Distribution of the species comprised in the most
numerous families of quadrupeds........ ....... 85
Section 'Concluding remarks on the distribution of tellurian
animals . .......................... . . . 94
Section 9-. -General, inferences from facts relating to the
! . dispersion of organized beings—Bearing of the
V conclusion obtained on the history of mankind. 96
Note on the Contents of Book I. ............ fj.......................... .. 97
BOOK II.
C o nsiderat ions r e la t iv e to t h e q uest ion, w h e th e r t h e v a r i-
KftUS races of men a r e of one or of SEVERAL SPECIES.—‘-ANALOGICAL
INVESTIGATION.
CHAPTER I.
Analysis o f the different Methods .of determining on Identity or
Diversity o f Species.
Section 1. Meaning attached to the terms species—genera—
varieties—permanent varieties—races