3 



do 



4 



do 



5 



do 



6 



do 



7 



do 



8 



do 



9 



do 



ROCKS. 19 



3. BLACK-RIVER LIMESTONE GROUP, 



INCLUDING THE CHAZY, BIRDSEYE AND BLACK-RIVER LIMESTONES. 



FIFTH TABLE CASE. 



Names. Localities. 



1 & 2 Chazy limestone (lower layers). Chazy, Clinton, 

 (encrinal layers). Chazy, Clinton, 

 (encrinal mass). Chazy, Clinton, 

 (encrinal layer with discs and plates). Chazy. 

 (with fossil shells). Chazy. 

 (oolitic). Chazy. 

 (oolitic). Big island, Orange, 

 (compact). Mount Lookout, Orange. 



10 Polished surface of the Encrinal layer. Chazy, Clinton. 



11 & 12 Chazy limestone (with Maclurea magna). Chazy. 

 13 & 14 do (with fragments of fossils). Chazy. 



15 do (two specimens, with fragments of shells). Chazy. 



16 do (two, with Maclurea and Raphistoma). Chazy.- 



17 do (with Atrypa and crinoidal columns). Chazy. 



18 Birdseye limestone (with Ortkoceras and Phytopsis). Great bend 



of the Black river, 

 (with fossils). Creek near Spraker's basin, 

 (with fragments of trilobites). Watertown, Jefferson, 

 (with obscure fossils). Sugar river near Boonville. 

 (with Phytopsis ccllulosum). Near Watertown. 

 (with Phytopsis tubulosum). Fortplain. 

 (with P. tubulosum). Near Boonville, Lewis. 



Fortplain, Montgomery, 

 (polished surface, exhibiting transverse sections of 



P. tubulosum). Fortplain. 

 Near Boonville, Lewis, 

 (with Phytopsis). Near Boonville, Lewis, 

 (with Phytopsis). Near Amsterdam, Fulton. 



19 





do 



20 





do 



21 





do 



22 





do 



23- 



-26 



do 



27 





do 



28- 



-30 



do 



31 





do 



32- 



-34 



do 



35 





do 



36 





do 



