2l8 TRANSACTIONS OF THE WAGNER FREE 



NOTE ON THE SYSTEMATIC DISCUSSION OF THE SPECIES. 



Since beginning work on this report, so much interest and energy has 

 been expended by Mr. Joseph Willcox, Mr. Chas. W. Johnson, of the Wagner 

 Institute, and other correspondents and friends, that box after box of material 

 has arrived, and the manuscript has been repeatedly rearranged to accommo- 

 date the notes and descriptions rendered necessary by these additional 

 researches. 



It has been thought best to arrange the additional material received since 

 the printing of Part I. in its zoological order in the present paper, rather 

 than break the continuity by relegating the whole to an appendix. The 

 material not touched upon in Part I. will be continued without any break to 

 the conclusion of the Gastropods. Part III., it is hoped, will contain the 

 Pelecypods, together with a general summary and tables. 



In explanation of the slow progress of this vi^ork, it should be stated that 

 the whole is done in the intervals of official work, and that upon the occur- 

 rence of such intervals its progress entirely depends. Much of the writer's 

 time during the past three years has been taken up in the official preparation 

 of a general account of the " Neocene" or Post-Eocene Tertiary of the United 

 States, which has recently been issued by the United States Geological Survey 

 as Bulletin of the Survey No. 84, This paper contains, with a geological map 

 of Florida, a discussion of the relations of the beds which would assist the 

 reader to understand the distribution of the fossils described in the present 

 report and the relations of the several beds referred to. Until Part III. of 

 this report is printed, such geological data as the reader may need can be ob- 

 tained from the above-mentioned bulletin. 



In order to avoid confusion in the references to plates, index, etc., when 

 the different parts of this report shall be bound together, as may frequently 

 happen, the pagination of this volume and the numeration of the plates are 

 severally continuous to those of Part I.; the pagination of Volume III., Part 2 

 beginning with page 201, while the first plate is numbered 13, the last page of 

 Volume III., Part i having been 200 and the last plate No. 12. 



Washington, July, i8g2. 



