[To face p. 424. 



Table VIII.— The Recurrent Fossils of the Devonian System of the State of New York; including the 

 species which enter from the Silurian. 





Fossils. 





Lower Silurian. 



Middle 

 Silurian. 



Upper Silurian. 





Lower Devonian. 



Middle Devonian. 



a 



= 



1 



<3 





j 





I 

 S 

 — 



1 

 ■3 



J 





a 



i 



I 



o. 



S" 



i 



3 



6 



= 

 ~ i 



i 



1 



1 



| 



3 





I 



-: 

 5 



c3 





=- 

 o 



i 

 £ 



1 



-> 

 =' 



5 



1 



| 







z. 



u 



a 



J 



H 



5 





u 



5 



-3 



G 



9. 



•a 



s 



6 



a 





5 



S 



6 



;3 







Cauda-galli 



Catenipora escharoides 



Favosites alveolaris 



Gothlandica 



Stroroatopora concentrica 



JLeptaena crenistria 



depressa 



linearis 



setigera 



Orthis Tullieusis 



umbonata 



acuminatns 



aperturatus 



cultrijugatus 



heteroclytus 



Niagarensis 











V 



s 



s 



s 







ll 



V 

 V 



11 

 V 



V 



s 

 s 



V 



11 



V 



11 



V 



V 



:. 



V 



ii 



S 



V? 





V 

 V 



::: 



V 

 V 



Va 

 V 



V 



V 



Va 



V 

 V 

 Va 



V 

 V 



V 



V 



V 



v" 



s 



H 



s 



Va 



s 

 s 



V 



11 



V 

 V 



H 



II 



II 



H 



V 

 H 



S 



s 



ii 

 ii 



V 



s 

 s 

 s 

 s 



s 

 s 







II 



V 

 V 



s 

 s 

 s 

 s 



H 



V 

 V 



s 



V 



s 



V 



V 

 V 



11 





Urii 



Atrypa affinis 



didyma 



emacerata ? 



lentiformis 



prisca 



reticularis 



aspera 



Nucula 



scabriculus 



Avicula Boydii 



fragilis 



muliilineata 



orbiculata 



Lucina rugosa 



Calymenc Blumenbachii 



Pleurotlictyum problematic hid 





In this Table the single 



30 ; the double 15 ; the triple 5 ; the quadruple 3 ; and the quintuple 5. 



