Foreword 



This little book is a companion to the author's FieU Guide to 

 Loner Aquarium Anitmih, in which invertebrate animals of the 

 Michigan area are figured and described. Doctor Boardman, at this 

 writing overseas as a First Lieutenant in tlie United States Army 

 Sanitary Corps, was granted leave of absence for military service 

 before many of the illustrations had been selected and before his 

 manuscript was ready for the compositor. In consequence, he should 

 not be held responsible for such errors as may have crept into the 

 finished book. 



We wish to give special acknowledgment and thanks to those 

 persons and institutions furnishing illustrations for the book with- 

 out remuneration to themselves. These are: 



American Museum of Natural History 



Dr. Sherman C. Bishop 



Mrs. Frank N. Blanchard 



General Biological Supply House 



Dr. Francis Harper 



Illinois State Natural History Survey, 

 through Dr. T. H. Prison 



Institute of Fisheries Research, of the 

 Michigan Department of Conservation; 

 A. S. Hazzard, Director 



New York State Museum, Dr. C. C. 

 Adams, former Director 



John G. Shedd Aquarium, through 

 Walter H. Chute, Director 



Dr. A. A. Wright 



Dr. A. H. Wright 



— T/jc Editors 



