PREFACE 



ALTERATIONS IN THE SECOND EDITION OF. 

 CONTRIBUTIONS, ETC. 



ADDITIONAL MATTER IN THE PRESENT VOLUME. 

 NATURAL SELECTION. 



PAGES 



Additional facts by Leroy, Spalding, Lowne, and Dixon on the 



Nest-Building and other Instincts of Birds . . . 108-112 



Dr. Abbott on Nesting of Baltimore Oriole . . .114 



Professor Jeitteles and Mr. Henry Reeks on Alterations in Mode 

 of Nest-Building . . . . . .115 



TROPICAL NATTTRE. 



Note on Dr. Shufeldt's Investigations into the Affinities of 

 Swifts and Hmnming-Birds . . . . .337 



THE ANTIQUITY OF MAN IN NORTH AMERICA. 

 (Additional Chapter) ...... 433-449 



THE DEBT OF SCIENCE TO DARWIN. 

 (Additional Chapter) ... . 450-475 



PARKSTONE, DORSET, 

 March 1891. 



