196 FIFTEENTH REPORT ON THE CABINET OF NAT. HISTORY. 

 GONIATITES PATERSONI ( Hall ). 



Thirteenth Report of the Regents on the State Cabinet, p. 99. 



The fragment figured was given to me many years since by a 

 person residing in the neighborhood of the locality, which is in the 

 Hamilton shales; and I could have no reason to doubt the correct- 

 ness of the position assigned to it. 



Kecently, however, Prof. Winchell has called my attention to a 

 figure of a Goniatite which is evidently specifically identical with 

 G. paterso7ii, the original of which was found in the rocks of the 

 Portage group*. About the same time. Prof. Dewey, of Rochester, 

 showed me some specimens of the same species, from the south part 

 of Livingston county, which, from the character of the adhering 

 green shale, left no doubt as to the geological formation from which 

 they were derived. It will probably be found that the G. patersoni 

 is not a Hamilton fossil, and that the specimen originally described 

 was thus associated through erroneous information. 



Fourteenth Report on State Cabinet, p. 91, for Cyclonema ventri- 

 co^a, read Cyclonema varicosa. Pages 96, 97 & 98, change the name 

 Clioderma to Pterotheca. 



Thirteenth Report on State Cabinet, p. 113 : Note upon the Trilohites 

 of the Hudson-river group in the Town of Georgia^ Vermont. 



This title was changed in a part of the edition, by substituting the 

 words "Quebec group" for "Hudson-river group", in deference to 

 the views advanced by the Geological Survey of Canada. A note, 

 giving an explanation of the reasons for this change, should have 

 been inserted at the end of the Report. 



We now know that the rocks included in the Quebec group are 

 of the same age as those of the Hudson-river group in its typical 

 localities in the Hudson valley, but not identical with the Pulaski 

 and Lorraine shales heretofore united with the Hudson-river group. 



* ''At Portage falls, Livingston county, New-York, in shaly sandstone of the Lower 

 Portage.'' 



