vi PREFACE. 



that the State would undertake to issue it, was finally published. in the Transactions 

 of the New York Academy of Sciences. The edition thus issued was not, of course, 

 designed for general distribution and but few copies couW have found their way to 

 Ohio. Through the courtesy of the Academy, I have been enabled to reproduce 

 Professor Whitfield's chapter, and also to use the engraved plates, prepared for the 

 Academy's Transactions. This constitutes Chapter III, Part II, of the present vol- 

 ume. It will be borne in mind that it was originally prepared under the direction of 

 Dr. Newberry and at the expense of the State, for Volume III, Paleontology. When 

 the plates were ordered for this chapter, the preparation of my Second Annual Re- 

 port was in progress, and the plates are accordingly printed as belonging to the 

 Second Annual Report. The Survey is greatly indebted to the courtesy of the New 

 York Academy of Sciences in this matter. 



A similar state of things was found in the case of a chapter prepared by Mr. E.O. 

 Ulrich of Newport, Kentucky, except that he had received no compensation for his 

 'work, this being made to depend on the publication of Volume III. I have 

 made good the promise of Dr. Newberry in this respect, also, and Mr. Ulrich's chap- 

 ter, viz. : chapter VII, will be found to be of great service and value to students of 

 Ohio paleontology. x 



Three other paleontological chapters I have been able to add to Volume VII. 

 through the generous and gratuitous contributions of the gentlemen named below, 

 Prof. C. L. Herrick, of Denison University, has thrown a great deal of light on the 

 history and subdivisions of the Waverly group of our series by his methodical 

 study of the paleontology of its different elements. The materials embodied in 

 his chapter had been previously published, in the main, in college bulletins ; but 

 they become for the first time accessible to the State at large in the present chapter, 

 viz., Chapter IV, Part II. 



Similar statements can be made as to Chapter V, prepared by A. F. Foerste, 

 Ph. D. He treats of the paleontology of a single formation of the Ohio scale, and 

 makes additions to our knowledge, of great interest and value. Part of his chapter 

 has been previously published in transactions of societies; but the same statement 

 applies to it as to the preceding chapter. 



Finally, Prof. E. W. Claypole of Buchtel College, contributes a very interesting 

 chapter, viz., Chapter VI, on the great fossil fishes of the Ohio shale. With his 

 chapter there is also included an important contribution in the same line by Prof. 

 A. A. Wright of Oberlin. This chapter may be counted a direct continuation of the 

 work in which Dr. Newberry was so deeply interested, and to which he gave so 

 much time and space in the previous reports of the Survey. 



The paleontological chapters thus enumerated are as follows : 



Chapter III, Contributions to the Paleontology of Ohio, by Prof. R. P. Whit-/ 

 field (originally prepared for Volume III, Paleontology). 



Chapter IV, The Waverly Group of Ohio, Prof. C. L. Herrick. 



Chapter V, The Clinton Gronp of Ohio, Dr. A. F. Foerste. 



Chapter VI, Fossil Fishes of the Ohio Shale, Professors E. W. Claypole and 

 A. A. Wright. 



Chapter VII, Damellibranchiata of the Lower Silurian Formation of Ohio, 

 E. O. Ulrich (originally prepared for Volume III, Paleontology). 



The cost of each of the two volumes of Paleontology previously published was 

 at least $60,000, the editions being 20,000. The present volume has been printed in 

 an inexpensive form, and the full equivalent of Volume III, Paleontology, is now 

 furnished to the people of the State at scarcely greater cost than a volume without 

 illustration would require. The ehoice was necessarily made between a volume 

 issued in this way and no publication of paleontology. 



'In making up my final volume I iound that chapters had been promised on 

 certain other subjects, by the organizations of the Surveys, with which I have been 



