Illustrations No. 7 and 8, transposed. 
CLINTON GROUP. 
NIAGARA GROUP. 
No. 11 is repeated at the head of the page over Strophomena. The numbers in this one and the five following ones 
should be made to correspond with those on the opposite pages, viz. 12, 13, 14,15, 16, 17. 
In the names and references for No. 13, Delthyris sinuatus, with its synonymes, follows in the same line with Delthyris 
ilecemplicata; this should commence the line below, preceded by fig. 8. 
CORNIFEROUS LIMESTONE. 
In the illustration No. 38, fig. 8 is accidentally removed from Strophomena lineata (See page 175 of this Report). 
GENESEE SLATE. 
Illustration 51: the numbering of fossils, after 4, should be 5, 6, 7, 8 (See page 223 of Report). 
CHEMUNG GROUP. 
Illustration 59, fig. 2, AvicuJa acanthoptera, name omitted. 
