u 
[Assembly 
was used in Hall's Geology, page 105, and also in the table of 
organic remains at the end of the volume. 
The foregoing wood illustrations are of the following fossils, 
and numbered as designated in the plated : 
1. Spirifer Niagarensis, 1 figure. 
2 and 2 b. Spirifer Radiatus, 2 figures. 
3 and 3 h. Spirifer Crispus, 2 do 
4 and 4 a. Spirifer Sulcatus, 1» do 
5. Orthis Flabellum, 2 do 
6. Orthis Elegantula, 4 do 
1 ah c. Orthis Hybrida, 3 do 
B. Spirifer Bilobus, 4 do 
8 species. 20 figures. 
