xvi Illustrations. 



DIAGRAM ILLUSTRATING THE EVOLUTION OF THE 



HORSE ........ 62 



THE PATAGONIAN CAVY — From Brehm's ^^ Natural 



History" ........ 74 



THE CAPYBARA — From Brehm's " Natural History " 76 



DARWIN SHOOTING AT A CONDOR . ... 78 



CAPE FROWARD, STRAITS OF MAGELLAN From 



Sprfs " Voyage of the Challenger " . . . 80 



MUD VOLCANOES, TURBACO, SOUTH AMERICA From 



Figuiers " World before the Deluge " . -9° 

 BARK-GATHERERs' CAMP IN PERU — From Figuier's 



"■Vegetable World" 102 



ELEPHANT TORTOISE, GALAPAGOS ISLANDS — From 



Brehins^^ Natural History" . . . .106 



DARWIN TESTING THE SPEED OF AN ELEPHANT 



TORTOISE (GALAPAGOS ISLANDS) . . . Io8 



A CORAL ISLAND, OR ATOLL — From Figuier s " Ocean 



World" . . . . . . . .112 



BIRGOS, OR COCOA-NUT CRAB . . . . -114 



darwin's study — From " The Century Magazine" 128 

 PORTRAIT OF CHARLES DARWIN — From " The Cen- 

 tury Magazine" . . . ■• ' • ^5° 



COLLECTING IN THE SARGASSO SEA . . . . 176 



