Maryland Geological Survey 109 



term to the Upper Cretaceous of Aix-la-Chapelle, and have proposed the 

 term Bernissartian (Purves, 1883) for the Lower Cretaceous, which is 

 often spoken of as Wealden and was formerly considered the age of the 

 Gault. That both these horizons, as well as several intermediate ones, 

 are present in this area is not at all improbable. The floras have been 

 studied by Cocmans,^ Saporta,^ and more recently by Seward.' Pro- 

 fessor Bommer is engaged at the present time in studying well-preserved 

 plant material of this age from near Brussels." A list of the recorded 

 species includes the following : 



Adiantites sp., Seward 



Algites sp.. Seward 



Cedrus corneti Coemans 



Cladophlebis TJnCeri (Dunker) "Ward 



CladophleMs Browniana (Dunker) Seward 



Conites minuta Seward 



Gycadeoidea (Cycadites) Schachti (Coemans) 



Equisetites ? sp., Seward 



Gleichenia ? (in fruit) Saporta 



Gleichenites sp., Seward 



LaccGpteris Dunkeri Schenk 



Leckenbya valdensis Seward 



Lycopodites sp., Seward 



Matonidium AJthaifsii (Dunker) Ward 



Onychiopsis psilotoides (Stokes and Webb) Ward 



Pinites Solmsii Seward 



Pinus Andrcci Coemans 



Pinus Briarti Coemans 



Pinus depressa Coemans 



Pinus gibbosa Coemans 



Pinus Heeri Coemans 



Pinus Omalii Coemans 



Pinus Toillezi Coemans 



^ Coemans, FI. foss. du premier etage du terrain cretace du Hainaut. Mem. 

 Acad. Roy. Belg., tome xxxvi, 1867. 



^ Dupont, Sur la decouverte d'ossements d'Iguanodon, de poissons et de 

 vegetaux dans la fosse Sainte-Barbe du charbonage de Bernissart, Bull. Acad. 

 Roy. Belg., (2e serie), tome xlvi, 1878, pp. 387-408 (plants determined by 

 Saporta on page 396). 



^ Seward, La Flore Wealdienne de Bernissart, Mem. Mus. Roy. d'Hist. Nat. 

 de Belg., Annee 1900. 



* Bommer, Nouveau gite de veget. decouvert dans I'argile Wealdienne de 

 Bracquegnies (Hainaut), Bull. Soc. beige, de- Geol. Paleont. et Hydrol., tome 

 vi, 1892, p. 160. 



