PART II
ON THE EVIDENCE FAVOURABLE AND OPPOSED TO THE VIEW THAT SPECIES ARE NATURALLY FORMED RACES, DESCENDED FROM COMMON STOCKS.
CHAPTER IV
ON THE NUMBER OF INTERMEDIATE FORMS REQUIRED ON THE THEORY OF COMMON DESCENT; AND ON THEIR ABSENCE IN A FOSSIL STATE [133]-[143]
CHAPTER V
GRADUAL APPEARANCE AND DISAPPEARANCE OF SPECIES. [144]-[150]
- Gradual appearance of species
- Extinction of species
CHAPTER VI
ON THE GEOGRAPHICAL DISTRIBUTION OF ORGANIC BEINGS IN PAST AND PRESENT TIMES.
- Distribution of the inhabitants in the different continents
- Relation of range in genera and species
- Distribution of the inhabitants in the same continent
- Insular Faunas
- Alpine Floras
- Cause of the similarity in the floras of some distant mountains
- Whether the same species has been created more than once
- On the number of species, and of the classes to which they belong in different regions
- Geographical distribution of extinct organisms
- Changes in geographical distribution
- Summary on the distribution of living and extinct organic beings