Maryland Geological Survey 10? 



also from the striking similarity in lithology between it and the Potomac 

 beds. 



The flora has been elaborated by Seward ^ who gives an abridged his- 

 torical sketch of its study in his introduction. The following species 

 are recorded : 



Acro&tichopteris Ruffordi Sew. 



Algites catenelloides Seward 



Algites valdensis Seward 



Androstrobus Nathorsti Sew. 



Anomozamites Lyellianus (Dunk.) 



Becklesia anomala Sew. 



Bennettites sp. 



Bennettites Camithersi Sew. 



Bennettites Carruthersi var. latifoUus Sew. 



Bennettites Gibsonianus Carr. 



Bennettites Saxbyunus (Brown) 



Brachyphyllum obesum Hear 



Brachyphyllum spinosum Sew. 



Bucklandia anomala (S. & W.) 



Carpolithes sp. 



Chara Knoivltoni Sew. 



Cladophlebis Albertsii (Dunk.) 



Cladophlebis Browniana (Dunk.) 



Cladophlebis DunJceri (Schimp.) 



Cladophlebis longipennis Sew. 



Conites (Araucarites) sp. 



Conites armatus Sew. 



Cycadites Rcemeri Schenk. 



Cycadites Saporta; Sew. 



Cycadolepis 



cf. Dichopteris Icevigata (Phill.) 



Dictyophyllum Rcemeri Schenk 



Dioonites Brongniarti (Mant.) 



Dioonites Dunkerianus Gopp. 



Equisetites Burchardti Dunk. 



Equisetites Lyelli Mantell 



Equisetites Yokoyamw Sew. 



Fittonia Ruffordia Sew. 



Leckenbya valdensis Sew. 



Marchantites Zeilleri Sew. 



Matonidium Althausii (Dunker) Ward 



Microdictyon Dunkeri (Schenk) 



cf. Nageiopsis heterophylla Font. 



Nilsonia schaumburgensis (Dunk.) 



^Seward, Wealden Flora, pt. i, 1894; pt. ii, 1895. 



