TO HIS EXCELLENCY REUBEK E. FENTON, 



O o B W H Or o/ the State of iTete- Tork. 



Sm : 



I HAVE the honor to submit to your Excellency Volume IV., Part 

 I., of the Report upon the Palaeontology of New- York, containing the 

 descriptions and figures of the Brachiopoda of the Upper Helderberg, 

 Hamilton, Portage and Chemung groups. The species are illustrated by 

 figures drawn and engraved from original specimens collected by myself 

 or under my direction, or those derived from other authentic sources. 



The completion of the printing has been delayed much longer than I 

 could have anticipated, and the volume should properly have been issued 

 in the early part of 1865. 



The plates of this volume, which number sixty-two, with several 

 intercalated ones, are not yet completed, and some time will elapse 

 before they can be finished. 



The manuscript, containing descriptions of the Crinoidea, Crustacea, 

 Gasteropoda, Cephalopoda, etc. of the higher rocks, forming the fifth 

 volume of the work, was delivered to the custody of the Commissioners 

 having charge of the work in September of last year. 



I have the honor to be, 



with great respect, 



your obedient servant, 



AiiBANT, March 1867. JAMES HALL. 



