TO HIS EXCELLENCY REUBEN E. FENTON, 
Governor of the State of M~ew-T@rh, 
Sir : 
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, 
Albany, March. 1867. 
JAMES HALL. 
