Maryland Geological Survey 105 



Sequoia subulata lusitanica Sap. 

 Sphenolepidium dehile Heer 

 Sphenolepis Kurriana (Dunk.) Schenk 

 Sphenolepis Stern'bergiana (Dunk.) Schenk 

 Sphenopteris capillaris Sap. 

 Sphenopteris Choffatiana infracretacica Sap. 

 Sphenopteris cuneifida Sap. 

 Sphenopteris debiliformis Sap. 

 Sphenopteris dissectifoUa Sap. 

 Sphenopteris dissectiformis Sap. 

 Sphenopteris flabellinervia Sap. 

 Sphenopteris flabellisecta Sap. 

 Sphenopteris ginkgoides Sap. 

 Sphenopteris Oomesiana Heer 

 Sphenopteris lobulifera Sap. 

 Sphenopteris lupulina Heer 

 Sphenopteris plurinervia Heer 

 Sphenopteris pseudolepida Sap. 

 Sphenopteris subtilinervis Sap. 

 Stachypteris minuta Sap. 

 Thuyites densior Sap. 

 Thuyites pulchelUformis Sap. 

 Widdringtonites debilis Sap. 

 Widdringtonites pygmwus Sap. 

 Williamsonia minima Sap. 

 Yuccites fractifolius Sap. 



There are 45 species of ferns, 20 species of conifers, and only 9 species 

 of cycads represented. The Williamsonia^ Yuccites^ Chang arniera, and 

 Poacites striatifoUus are considered Proangiospermse, and the balance 

 of the species of Poacites, as well as RTiizocaulon, Alismacites, and 

 Caulinites are classed as Monocotyledonse, Phyllites prohlematicus, and 

 Cedrelospermites are referred to the Dicotyledonas with a query. 



It may be noted that seven species (one equisetum, four ferns, and two 

 conifers), cosmopolitan Lower Cretaceous types, are present in the Po- 

 tomac flora, while sixteen of the genera are represented in the Maryland- 

 Virginia area. 



France 



In France the Wealden type of sedimentation is developed according 

 to De Lapparent south of Beauvais in the Pays de Bray (see Kilian) 



