CONTENTS 
xii 
of Flowers and their Geographical Distribution — Recent Views as 
to Direct Action of Light on the Colours of Flowers and Fruits — 
Concluding Remarks on the Importance of Colour in the Organic 
World — On the Origin of the Colour-sense: Supposed Increase of 
Colour-perception within the Historical Period — Concluding Remarks 
on the Colour-sense ..... Pages 395-415 
VII. The Antiquity and Origin of Man 
Indications of Man’s extreme Antiquity — Antiquity of Intellectual Man 
— Sculptures on Easter Island — North American Earthworks — The 
Great Pyramid — Conclusion . . ... 416-432 
VIII. The Antiquity of Man in North America 
Ancient Shell Mounds — Man Coeval with Extinct Mammalia — Man in 
the Glacial Period — Palaeolithic Implements in North America — The 
Auriferous Gravels of California — Fossil Remains under the Ancient 
Lava Beds — Works of Art in the Auriferous Gravels — Human 
Remains in the Auriferous Gravels — Concluding Remarks on the 
Antiquity of Man ...... 433-449 
IX. The Debt of Science to Darwin 
The Century before Darwin — The Voyage of the Beagle — The Journal 
of Researches — Studies of Domestic Animals — Studies of Cultivated 
and Wild Plants — Researches on the Cowslip, Primrose, and Loose- 
strife — The Struggle for Existence — Geographical Distribution and 
Dispersal of Organisms — The Descent of Man and later Works — 
Estimate of Darwin’s Life-Work .... 450-475 
Index 
476 
