Maryland Geological Survey 505 



are clearly identical with the former and both are entirely distinct from 

 the fragments described by Professor Fontaine from the Fuson forma- 

 tion of the Black Hills as Ficophyllum serratum. The species is clearly 

 distinct from any other known Lower Cretaceous forms and while it 

 shows no obvious relationship with the other Potomac species of Fico- 

 phyllum nothing is to be gained by any new proposal of botanical 

 aSBnity since the latter is entirely speculative. The forms are obviously 

 not related to any known forms of Ficus; in fact their dicotyledonous 

 nature is entirely doubtful and they might equally well be referable to 

 some member of the Monocotyledonge, the Filicales, or even some member 

 of the Gnetales among the Gymnosperms. ISTo additional material of 

 this species has ever been discovered and were the name not already in 

 the literature it would be preferable to describe it under the non-com- 

 mital name Phyllites or even leave it altogether undescribed. 



Occurrence. — Patuxent Formation. Fredericksburg, Virginia. 

 Arundel Formation. Langdon (?), District of Columbia. 



Collection. — IT. S. ISTational Museum. 



Ficophyllum oblongipolium (Fontaine) Berry 



Protecephyllum oblongifolium Fontaine, 1890, Mon. U. S. Geol. Survey, vol. 



XV, 1889, p. 284, pi. cxxxix, fig. 5; pi. cxl, figs. 1, 2. 

 Protecephyllum sp., Fontaine, 1890, Mon. U. S. Geol. Survey, vol. xv, 1889, 



p. 284, pi. cxxxix, fig. 2. 

 Ficophyllum crassinerve Fontaine, 1890, Mon. U. S. Geol. Survey, vol. xv, 



1889, p. 291, pi. cxliv, fig. 3; pi. cxlv, fig. 3; pi. cjlvi, fig. 1; pi. cxlvii, 



fig. 4; pi. cxlviii, figs. 1, 2, 4; pi. civil, fig. 4; pi. clxxiii, fig. 10 (non 



Fontaine in Ward, 1906). 

 Ficophyllum tenuinerve Fontaine, 1890, Mon. U. S. Geol. Survey, vol. xv, 



1889, p. 292, pi. cxl, fig. 3; pi. cxli, fig. 2; pi. cxlv, figs. 1, 4; pi. cxlvii, 



fig. 2; pi. cxlix, figs. 1, 3, 5; pi. clvi, fig. 1 (non Fontaine in Ward, 



1906). 

 Ficu^ virginiensis Fontaine, 1890, Mon. U. S. Geol. Survey, vol. xv, 1889, p. 



295, pi. cxliii, figs. 1, 3; pi. cxliv, fig. 1. 

 Ficus Fredericksburg ensis Fontaine, 1890, Mon. U. S. Geol. Survey, vol. xv, 



1889, p. 295, pi. cxlviii, figs. 3, 5. 

 Sapindopsis cordata Fontaine, 1890, Mon. U. S. Geol. Survey, vol. xv, 1889, 



p. 296, pi. cxlvii, fig. 1. 

 Saliciphyllum ellipticum Fontaine, 1890, Mon. U. S. Geol. Survey, vol. xv, 



p. 303 (pars), pi. cxlvi, figs. 2, 4; pi. cl, fig. 3; pi. clxiii, fig. 5; pi. 



clxvi, fig. 2. 



