In this section, from one by Hall, taken in 



Fig. 550 B. 



"277 



DEVONIAN AGE. 



Yates County, N.Y., 10 ,,10 MO ^re 



116 



11a 



10 c 



Section of rocM oi "« "»— th 



Genesee ^'.^^2nX "»*«--«•=?•«. continued into Ohio, 

 ■^Stf- Net Yo* * «* -£Kf SS Ohio and the States west 



a ?&££&£* - *+ oi portase age - 



II. Life. 



1. Plants. 



j +v»orp are remains oi 



Figs. 551-554. 



^^ „• 552 Sigma* Van«e mi ; «8, I***— Chemon 

 nOTS _** m. Cyclop^ Havana, W,^ ^ ^ ^. 



' , rilboa N. Y., is named by Dawson Cyclop- 



