286 PALAEONTOLOGY OF ILLINOIS. 



The material upon which the present report is based is mostly 

 contained in the State Museum at Springfield. A few illustra- 

 tive species not in the museum were loaned for description from 

 private collections. Of these, whenever possible, I have placed 

 typical examples into the State collection, so that it may be 

 claimed with truth, that as a collection of Upper Palaeozoic 

 Bryzoa at any rate, it stands unsurpassed. The numerous thin 

 sections required for the work, were all personally prepared by 

 me. The illustrations, too, have all been drawn, and many of 

 them transferred to stone, by myself. On the remainder the 

 lithographic work was done, under my personal supervision, by 

 Mr. Charles Schuchert, to whom I am much indebted for the fidelity 

 and skill he has shown in the performance of his difficult task. 



To Mr. J. M. Nickles of Sparta, Illinois, who has not only 

 amassed a large collection of Palaeozoic Bryozoa but also is 

 conversant with their structure, I am especially indebted for 

 much valuable assistance both by way of advice and specimens. 



And to you, my dear sir, I cannot sufficiently express my 

 gratitude for the encouragement and many kindnesses that I 

 have received at your hands, nor can I forget the marked 

 patience and sympathy that you have shown me throughout 

 the progress of my work. 



Very respectfully yours, 



E. O. ULRICH. 



