CONTENTS. XXI 



Inbreeding of Eaees and Species. — Mutability of Species. — Classi- 

 fication of Mankind. — Relation to the Ape. — The Human Kingdom 

 according to Geoffrey Saint-Hilaire and Quatrefages. — Objections 203 



LECTUEE IX. 



Primeval period of Mankind. — Discovery of Human Remains associated 

 with those of Extinct Animals. — Cuvier's Objections. — Human Re- 

 mains in Caverns. — Formation of Caverns. — Stalactites. — Osseoiis 

 breccia. — Preservation of Bones. — Mode in which the Caverns were 

 fiUed. — The Extinct Cavern Inhabitants. — Extinct and Living 

 Species. — Extinction of some species within the Historical Period. 

 — SchmerUng's Discoveries. — The Cavern of Engis. — Caverns of 

 Lombrive and Lherme. — Grottoes of Arcy. — Grotto in the Neander 

 VaUey. — Grotto of Auiignac .... 232 



LECTUEE X. 



Human Remains from Denise, near Puy. — Fraudulent speculations. — 

 Diluvium in the Somme VaUey. — Flint Implements. — Human Jaw. 

 — Diluvium of Joinville. — Diluvium of Hoxne. — Brazilian Caverns. 

 — Alluvium of North America. — Civilisation of Primitive Peoples. 

 — Skulls of Engis and the Neander Valley. — Proportions of these 

 Crania compared to those of living races of Mankind and Apes - 262 



LECTUEE XI. 



The Diluvial Period. — Revolutions and Transitions. — Glacial forma- 

 tion. — Boulder-Clay. — Old Alluvium. — Terminal Moraines and Er- 

 ratic Blocks. — Slate-Coalj and its Formation. — Ice-sea and Glacial 

 Formation in the North — In England. — Table of Diluvial Strata. 

 — Length of Time. — Chronological Calculations in the Delta s of the 

 Mississippi and the Nile. — Impossibility of a Universal Deluge. - 308 



LECTUEE XII. 



Stone Period in the North. — Eefuse-heaps. — Peat-bogs. — Graves in 

 Denmark and Mecklenburg. — Grotto of Chauvaux. — Pile-works on 

 the Swiss lakes and moors. — Civilisation of the Stone Period. — 

 Agricultm-e of the Pile-builders. — SkuH of Meilen. — Pile-works 

 in Italy. — Chronological Calculations of Morlot, GiUieronj and 

 Troyon. — Pious Fancies of the latter - - . 333 



LECTUEE XIII. 



Distinctive Characters of the Cavern- and Stone-Period. — Skulls of 

 Denmark. — Arching of the Forehead. — Apostle-Skulls of Switzer- 

 land, and their Age. — The Jaw of Moulin-Qviignon. — Skulls of 

 Lombrive compared with those of the present Basques. — Danish 

 Stone-Skulls compared with the present Lapps. — Skull of Meilen. — 

 Relation to the present Swiss Skulls. — Romanic Short-Heads. — 



