Maryland Geological Survey 139 



number 13 species, and there are 8 conifers and 1 equisetum. Ten Po- 

 tomac species are more or less satisfactorily represented and 2 or 3 addi- 

 tional are doubtfully represented. 



Portugal 



The Portuguese beds which have been referred to the Aptian by Choffat 



and Saporta contain the following flora according to Saporta : 



Bambusium latifoUum Hoer ? 



Br achy phy Hum confusum Saporta 



Brachyphyllum obesum Heer 



Garpites burmanniceformis Saporta ? 



Caulinites atavinus Heer 



Gladophlebis Dunkeri (Scliimper) Seward 



CtenicUum dentatum Heer 



Ctenidium integerrimum Heer 



CzekanowsJca nervosa Heer 



Frenelopsis leptoclada Saporta 



Frenelopsis occidentalis Heer ? 



Laccopteris pulchella Heer 



Matonidium AlthausU (Dunker) Ward 



Onychiopsis psilotoides (Stokes and Webb) Ward 



Poacites plurinervius Saporta 



Sequoia lusitanica Heer 



Sphenolepidium debile Heer 



Sphenolepis Kurriana (Dunker) Schenk 



Sphenolepis Sternbergiana (Dunker) Schenk 



Sphenopteris angustiloba Heer 



Sphenopteris plurinervia Heer ? 



Sphenopieris tenuiflssa Saporta 



Twnidium lusitanicum Heer 



Thuyites debilis Saporta 



Thuyites pulchelUformis Saporta 



Seven of the foregoing are ferns, 2 are cyeads, and 11 are conifers. 

 Three of the forms are considered monocotyledons. Four of the species 

 are present in the Potomac flora. 



Fra7ice 

 The following two species are recorded from beds referred to the 

 Aptian ^ in the French area : 



Cylindrites latifrons Saporta 

 Pinus mammilifer Saporta 



^ Saporta, Mera Soc. Geol. de Normandie, 1877. 



