468 AMERICAN FOSSIL BRYOZOA. [bull. 173. 



LIST OF PAPERS TREATING OF BRYOZOA. 



The following list includes all papers which treat exclusively of 

 bryozoa. Works of which the bryozoa form an incidental part have 

 been included when the bryozoa portion was deemed important. 

 Doubtless a considerable number of papers have been overlooked, 

 but it is hoped that the omissions will not prove serious. 



For easy reference the authors' names have been arranged alpha- 

 betically, and their papers have been listed in chronological order. 

 The dates given may not always be exactly correct, but they are prob- 

 ably seldom far astray. In cases where the actual date of publication 

 is known to be considerably different from the title-page date the 

 former is used. Titles of serials have usually been written in full in 

 this list, but abbreviated in the second list. 



In the second list the foregoing papers have been rearranged under 

 several heads, so as to bring together those answering the needs of 

 special workers. It has not been deemed practicable to classify except 

 under large heads. Some errors in classification will no doubt be 

 detected. Occasionally the titles given to their papers by authors are 

 unintentionally misleading. A large number of papers I have been 

 unable to examine, and many references are given on the authority of 

 other writers. 



Under the several heads the chronologic order has been adopted, 

 as such an arrangement is verj' suggestive, both of the progress of 

 knowledge and the point of view of the several authors. Under each 

 year the authors' names are arranged alphabetical 1}% Some works 

 which I have not examined are included under "General;" an exami- 

 nation of these might show however that they would be more 

 appropriately placed under other heads. 



It is hoped that the general usefulness of the list will atone for 

 unavoidable shortcomings. The amount of literature devoted to one 

 comparatively small class of the animal kingdom will no doubt be 

 surprising. 



For the opportunity of consulting the libraries of Washington, 

 District of Columbia, without which the list could not have been com- 

 piled, I have to thank the Hon. Charles D. Walcott, Director of the 

 United States Geological Survey. Some members of the staff of the 

 United States National Museum, and especially Mr. Charles Schuchert, 

 have given valued help. 



John M. Nickles. 



