PREFACE Vll 



graphs marked V. H. L. ; these are published by permis- 

 sion of the Director of the Station. The majority of the 

 original photographs, designated by the initials W.H.C.P., 

 were made by Mr. William H. C. Pynchon, Instructor in 

 Biology at Trinity College, Hartford. All of these, ex- 

 cepting Figs. 183, 184, 188, and 203, are photographs of 

 animals occurring around the Biological Laboratory at 

 Cold Spring Harbor, Long Island. They have thus a cer- 

 tain scientific value as indicating the fauna of that region. 

 As many of these figures are from living animals, probably 

 never before photographed in their natural attitudes, their 

 publication may be considered as something of a contribu- 

 tion to science. Of the other photographs, Figs. 31 a, 122, 

 276, 281, and 288, marked D. and S., were contributed by 

 Professor N. F. Davis of Bucknell University, Lewisburg, 

 Penn., and Mr. Ernest A. Sterling of the same institu- 

 tion; and Figs. 127, 251, and 259 were contributed by 

 Mr. E. R. Downing, graduate student at the University 

 of Chicago. The figures of birds by Louis Agassiz 

 Fuertes have been reproduced from " Citizen Bird," by 

 Mrs. Wright and Dr. Coues, published by the Macmillan 

 Company. Figures of the types used in the outline of 

 laboratory work have been purposely avoided. 



Finally, the authors have to thank several secondary 

 teachers who have kindly made suggestions and helpful 

 criticisms on the outline of laboratory work and the main 

 text. AVe solicit a continuance of these favors to the end 

 that this book may become as perfectly adapted as pos- 

 sible to the needs of secondary instruction in zoology. 



C. B. DAVENPORT. 



GERTRUDE C. DAVENPORT. 



CHICAGO, May 19, 1900. 



