CORRIGENDA. 



In arranging the woodcuts of fossils, it has been found necessary to affix 

 to them different numbers from those by which they were originally denoted, 

 and by which they have been referred to in Appendix B. The reader will, 

 therefore, to avoid confusion, disregard entirely the references by numbers 

 scattered through the pages of such appendix, and find the illustrations 

 by the lists printed opposite the engravings. 



In regard to the newly discovered fossils mentioned on p. 50 as indicating 

 the existence of fossiliferous strata older than the Potsdam sandstone (such 

 as has been supposed to exist in the controverted "Taconic System"), a 

 probable opinion seems to be that these fossil-bearing strata are not really 

 of such a lower series ; neither of the Hudson-river group ; but that they 

 belong to an intermediate position, and are equivalent in age to the Cal- 

 ciferous sandstone and Chazy limestone. These rocks may, in the Green 

 Mountain chain, be much more largely developed than in New- York, and 

 may contain many more fossils, while their disturbed condition in the up- 

 heaved hill-ranges renders it extremely difficult to trace out their true age 

 and relations. 



On p. 61, for Meganteris ovoides, read Meganteris elongata. 



}\ 



[Assembly, No. 136.] 



