Vi PREFACE 



'.'Evolution and Conservation," or applied ecology, belong together in a 

 final summary. Conservation is already taking its place as a part of Evolution. 



I am grateful to all those who have made this work first of all a pleasure 

 to me. There are more of them than I can name here. 



First are my colleagues in the Department of Zoology in Mount Holyoke 

 College; Professors A. E. Adams, E. M. Boyd, J. W. Kingsbury, C. Smith, 

 I. B. Sprague and K. F. Stein. Dr. Adams has been generous beyond my 

 telling in giving her time, scholarship and keen critical sense. 



Others have read parts of the book and given suggestions that have greatly 

 helped. These are: Dr. H. M. Allyn, former Dean of Mount Holyoke Col- 

 lege; Dr. E. P. Carr, Professor of Chemistry, Mount Holyoke College; Dr. 

 M. P. Cloud, Librarian of Peabody Museum, Yale University; Dr. E. T. 

 Eltinge, Associate Professor of Plant Science, Mount Holyoke College; Dr. 

 M. P. Grant, Professor of Zoology, Sarah Lawrence College; Dr. E. K. Moyer, 

 Associate Professor of Anatomy, Medical School, Boston University; Dr. 

 F. A. Saunders, Professor of Physics, Harvard University. 



The original drawings except a very few of my own have been made by 

 Shirley P. Glaser, Biological Artist of the Peabody Museum of Yale Uni- 

 versity. I have been fortunate in having the benefit of her ability and ex- 

 perience. Other illustrations, exclusive of my own photographs, are used 

 through the courtesy of those whose names are written beneath them. The 

 generosity of many authors in particular is a cause of my warm thanks. 



There are many others whose interest and good wishes I have appre- 

 ciated. Among them are Andrew Bihun of the National Audubon House; 

 J. P. Hughes of the W. B. Saunders Company; my sister, Christine M. Kenyon; 

 and my brother, Stanley D. Morgan. 



Finally I give my hearty thanks to those who have helped to make my 

 manuscript into a book. At first, Helen L. Goodwin, and later, Irene Moss- 

 man have typed the revisions with exacting accuracy. 



Fortunately, the index of Kinships has been made by a biologist who is 

 also a librarian. Dr. M. P. Cloud of the Peabody Museum at Yale University. 



Ann H. Morgan 



