PUBLICATIONS. XI 



Reprints. 



The matter published by the Society is occasionally reprinted, sometimes in 

 part only, sometimes in extended or otherwise modified form, and incidental cog- 

 nizance is taken of such reprints. The following reprint has been noted : 



Volume 3, pages 283-300, plate 9 : Reprinted with some additional matter under 

 the title — The | Classification | of the | Lower Carboniferous | Rocks | of the | 

 Mississippi Valley l| A Dissertation | presented to the Board of University 

 Studies of the Johns | Hopkins University for the Degree of Doctor | of Phi- 



osophy || By | Charles Rollin Keyes. [ 1892. | | Washington : | Judd & 



Detweiler, Printers | 1892. 



