BIGSBY PALAEOZOIC ROCKS OF NEW TORE:. 



295 



Table XYIII.- 



'The Silurian Fossils of the State of New York in their 

 different Sedimentary Habitats. 



p= Potsdam Sandstone. 

 cs==Calciferous Sandstone. 

 c=Chazy Limestone. 

 B= Bird's-eye Limestone. 

 T= Trenton Limestone. 

 u=Utica Slate. 

 HR= Hudson River Rocks. 

 M=: Medina Sandstone. 



cl=: Clinton Rocks. 



N= Niagara Rocks. 



CL = Coralline Limestone of Schoharie. 



OS = Onondaga Salt Grroup. 



w=Waterlime Group. 



PL = Lower Pentamerus Limestone. 



DS=:Delthyris Shaly Limestone. 



UP = Upper Pentamerus Limestone. 



*^* The Authorities followed in the determination of the sediments are chiefly Hall, 

 Vanuxem, Emmons, and De Verneuil. 





1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 





<a 









6 





o 











03 





Fossils. 



s 



'bjo 



C 



O 

 O 



o 



-4^ 

 CO 



o 



O 

 OS 



O 



o 



i 



03 



O 



© 



o 



OQ 



O 



<D 



S3 

 o 



09 



O 



q5 



o 



6 



W. 



m 



O 



0) 



o 



OJ 



OQ 



o 



fl5 

 o 



02 



1 



m 

 O 



O 



s 

 § 



i 



03 





0) 





oS 



© 





o3 



!S 







cc 



O 





ID 





o 



^ 



o 



O 



•a 



^ 



Ui 



o 



•?n 



o 



o 



Tn 



a 





w. 



m 





j» 



M 



03 



o 





^ 



Q 





^ 



h3 



Plants. 





























? Scolithus linearis 









P 





















verticalis 









P 





















Palseophycus tubercularis 













cs 

















irregularis 













cs 

















rugosus 

























T 





simplex 





















T 









virgatus 











HR 



















striatus 











cl 



















tortuosus 











M 



















sp. ind 











HR 



















sp. ind 











cl 



















Anthrophycus Harlani 









M 





















sp. ind a 









M 





















Buthrotrephis antiquata 













cs 

















tenuis 

























T 





succulea 













• . . 













T 





subnodosa 











HR 



















flexuosa 











HR 



















gracilis 











cl 



















var. crassa 











cl 



















var. intermedia 











cl 



















palmata 









cl 





















impudica 











cl 



















ramosa 











cl 



















Sphenothallus angustifolius 



















u 











latifolius 











HR 



















Phy topsis tubulatus 

























B 





cellulosus 

























B 



B 



VOL. XV. PART I. 



