PREFACE. XI 



matter in fine print, which is intended only for such schools as 

 can give a full year to the subject of Zoology. 



7. The headings of paragraphs are printed in black-faced 

 type, in order to emphasize the analysis of subject matter. 

 Technical terms are in italics the first time they appear. The 

 author does not agree that all technical language should be 

 omitted from even an elementary course. 



The author extends most cordial thanks to the many pub- 

 lishers and authors whose courtesy enables him to reproduce 

 classic illustrations from their copyrighted works. Especially 

 to be mentioned are Macmillan & Co., D. Appleton & Co., 

 Wm. Blackwood & Sons, Adam and Charles Black, Swan 

 Sonnenschein & Co., Henry Holt & Co., Houghton, Mifflin & 

 Co., The Open Court Publishing Co., N. G. Elwert, Leipzig; 

 Dr. Carl Chun, Leipzig; The Division of Publications, Wash- 

 ington, D. C, University of Minn. Agricultural Experiment 

 Station, Dr. A. Agassiz, Dr. George Dimmock, Dr. Henry 

 C. McCook, Professor G. H. Parker. Recognition is given 

 to the sources in immediate connection with the figures. 



The thanks of the author are also due to many fellow teach- 

 ers for suggestions and criticisms during the progress of the 

 work ; but especially to Dr. Frank W. Bancroft of the Univer- 

 sity of California and Professor J. H. Gerould of Dartmouth 

 College who made extensive criticisms and suggestions while 

 the book was in manuscript, and to Dr. J. W. Folsom of Illinois 

 University to whose skill and painstaking is due whatever 

 merit the original drawings may possess. Many of the origi- 

 nal photographs were also made by Dr. Folsom. 



T. W. GALLOWAY. 

 JAMES MILLIKIN UNIVERSITY. 



