184 Bulletin Wisconsin NoMonal History Society. [Vol. 9, No. 4. 



such publication as may have a description of the species and is 

 generally to be found in any good circulating library, or in the 

 library of a scientific society; as a rule these descriptions have 

 been published in geological reports and bulletins issued by state 

 and Scientific Societies outside the State of Wisconsin. 



Many references will be found to the i8th Annual Report of 

 the Regents of the University of the State of New York 1864, 

 this report will be found bound as a part of the 20th Annual 

 Report of that Institution for 1867. All references to the Annual 

 Report of the Wisconsin Geological Survey 1879, are to the 

 report of T. C. Chamberlin, Chief Geologist for that year, and it 

 is to be found bound with the Governor's Message of that year, 

 and is also known as Public Document No. 15. 



For information that has been of the most important assist- 

 ance to us in our work, we are under many obligations to Dr. 

 John M. Clarke, Director of the New York State Geological Sur- 

 vey, Albany, N. Y. ; Prof. C. D. Walcott, Secretary of the United 

 States National Museum, Washington, D. C. ; Prof. Stuart 

 Weller, Palaeontologist, Department of Geology of the University 

 of Chicago, and Professors Eliot Blackwelder and Arthur Beatty 

 of the University of Wisconsin. 



All of the publications referred to in this list we would recom- 

 mend to the student, to which we would add, "A Synopsis of 

 American Fossil Bracluopoda" by Charles Schuchert in Bulletin 

 87 of The U. S. Geological Survey. And, "A Synopsis of Ameri- 

 can Fossil Bryozoa," Nickles and Bassler, Bulletin 173 of the U. S. 

 Geological Survey. 



There is now being issued by the Geological and Natural His- 

 tory Survey of the State of Wisconsin a report known as Bulletin 

 Twenty-one by Prof. Herdman, F. Cleland of Williams College, 

 Williamstown, Mass., under the title, "The Fossils and Stra- 



