CHAPTER 22. — OBJECTIONS TO THE HYPOTHESIS OF TRANSMUTATION CONSIDERED.

  Statement of Objections to the Hypothesis of Transmutation
     founded on the Absence of Intermediate Forms.
  Genera of which the Species are closely allied.
  Occasional Discovery of the missing Links in a Fossil State.
  Davidson's Monograph on the Brachiopoda.
  Why the Gradational Forms, when found, are not accepted as
     Evidence of Transmutation.
  Gaps caused by Extinction of Races and Species.
  Vast Tertiary Periods during which this Extinction has been going
     on in the Fauna and Flora now existing.
  Genealogical Bond between Miocene and Recent Plants and Insects.
  Fossils of Oeningen.
  Species of Insects in Britain and North America represented by
     distinct Varieties.
  Falconer's Monograph on living and fossil Elephants.
  Fossil Species and Genera of the Horse Tribe in North and
     South America.
  Relation of the Pliocene Mammalia of North America, Asia,
     and Europe.
  Species of Mammalia, though less persistent than the Mollusca,
     change slowly.
  Arguments for and against Transmutation derived from the Absence
     of Mammalia in Islands.
  Imperfection of the Geological Record.
  Intercalation of newly discovered Formation of intermediate Age
     in the chronological Series.
  Reference of the St. Cassian Beds to the Triassic Periods.
  Discovery of new organic Types.
  Feathered Archaeopteryx of the Oolite.