L LUST RAT IONS 
Page. 
Plate I. Geological stations in eastern Pennsylvania and Hew York. .Frontispiece. 
II. a. Aiciueopteris obtnsa Lx., Catskill, Phoenicia, Ulster Comity, N. Y. 
b. Detail of pinnule between the ultimate pinme in same specimen 
c. Detail of pinnule of ultimate pinnic 49 
Fit;. 1. Stations along the Delaware, Lackawanna and Western Railroad 45 
