CONTENTS OF VOL. II. 



CHAPTER XV. 



PAGE 



PERIODS OF CREATION AND RECORDS OF CREATION. 



Reform of Systems by the Theory of Descent. — The Natural System as a 

 Pedigree.^Palseontological Records of the Pedigree. — Petrifactions 

 as Records of Creation. — Deposits of the Neptunic Strata and the 

 Enclosure of Organic Remains. — Division of the Organic History of 

 the Earth into Five Main Periods : Period of the Tangle Forests, 

 Fern Forests, Pine Forests, Foliaceous Forests, and of Cultivation. — 

 The Series of Neptunic Strata. — Immeasurable Duration of the 

 Periods which have elapsed during their Formation. — Deposits of 

 Strata only during the Sinking, not during the Elevation of the 

 Ground. — Other Gaps in the Records of Creation. — Metamorphic 

 Condition of the most Ancient Neptunic Strata. — Small Extent of 

 Palseontological Experience. — Small pro]portion of Organisms and 

 of Parts of Organisms Capable of Petrifying. — Rarity of many 

 Petrified Species. — Want of Fossilised Intermediate Forms. — 

 Records of the Creation in Ontogeny and in Comparative 

 Anatomy ... ... ... 1 



CHAPTER XVI. 



PEDIGREE AND HISTORY OF THE KINGDOM OF THE 



PROTISTA. 



Special Mode of Carrying out the Theory of Descent in the Natural 

 System of Organisms. — Construction of Pedigrees. — Descent of all 

 Many-celled from Single-celled Organisms. — Descent of Cells 

 from Monera. — Meaning of Organic Tribes, or Phyla. — ^Number of 

 the Tribes in the Animal and Vegetable Kingdoms. — The Monophy- 

 letic Hypothesis of Descent, or the Hypothesis of one Common 

 Progenitor, and the Polyphyletic Hypothesis of Descent, or the 

 Hypothesis of many Progenitors. — The Kingdom of Protista, or 

 ■ Primaeval Beings. — Eight Classes of the Protista Kingdom : 

 Monera, Amoebse, or Protoplastse ; Whip-swimmers, or Flagellata ; 

 ated-balls, or Cili Catallacta ; Labyrinth-streamers, or Labyrinth- 



