iv PREFACE. 



University ; Mr. J. Y. Bergen, Jr., Peabody, Mass. ; Prof. 

 R. E. Call, Missouri Agricultural College and University, 

 Columbia, Mo. ; Mr. E. P. Jackson, Boston Latin School ; 

 Prof. L. M. Underwood, Syracuse University, Syracuse, 

 N.Y., and other well-known teachers. In the preparation 

 of the book, free use has been made of the works cited in 

 the text. 



To aid in the study of the marine animals, arrangement 

 has been made by which schools may be supplied with 

 sets of material put up at the Seaside Laboratory, Annis- 

 quam, Mass. A list of these specimens will be found at 

 the end of this book. They may be obtained of Mr. B. H. 

 Van Vleck, Assistant, Boston Society of Natural History. 



It is believed that with the assistance above acknowl- 

 edged, the book will be found fairly free from errors ; but, 

 for any mistakes it may contain, the author alone should 

 be held responsible. 



The author believes that he has encouraged only the 

 most merciful methods of handling live animals, and he 

 would strongly urge all teachers not to do anything that 

 might lead to cruelty to animals. 



The only way to know animals, is to see and to handle 

 them ; and it is sincerely hoped that the day is near when 

 knowing an animal's name will not pass for knowing the 

 animal itself. If this little book should do somewhat 

 toward the improvement of methods of teaching zoology, 

 the author will feel that he has not labored in vain. 



OTTAWA, ILL., Aug. 20, 1886. 



