Maryland Geological Survey 479 



elsewhere in Maryland. From Virginia it is recorded in beds of this 

 age at the 73-mile post near Brooke, near Widewater and White House 

 Bluff. The same species also occurs at Evan's quarry in the Black 

 Hills at a horizon which Prof. Ward places low down in the Dakota 

 Group but which may be more properly included in the Fuson formation 



They find their counterpart in the European Cretaceous in the forms 

 described by Saporta from the Albian of Buarcos in Portugal as 

 MyrsinopJiyllum revisendum.^ 



Occurrence. — Patapsco Formation. Ft. Foote, Prince George's 

 County, Maryland ; White House Bluff, near Brooke, Widewater, Chinka- 

 pin Hollow, Virginia. 



Collections. — U. S. National Museum, Johns Hopkins University. 



Celastrophyllum Brittonianum Hollick 

 Plate XC, Fig. 3 



Celastrophyllum Brittonianum Hollick, 1896, in Newberry, Mon. U. S. Geol. 

 Survey, vol. xxvi, 1895, p. 105, pi. xlii, figs. 37, 38, 46, 47. 



Celastrophyllum Brittonianum Ward, 1896, 15tb. Ann. Rept. U. S. Geol. Sur- 

 vey, 1895, pp. 349, 358, 377, 378, 379. 



Celastrophyllum Brittonianum Ward, 1906, in Fontaine, Mon. U. S. Geol. 

 Survey, vol. xlviii, 1905, p. 493, pi. cvii, fig. 7. 



Description. — Leaves small, 4 cm. to 5 cm. in length by 1.2 cm. to 2.1 

 cm. in maximum width, which is at or above the middle. Outline ovate- 

 lanceolate, varying toward spatulate in some specimens, with an acute 

 apex and a cuneate or somewhat decurrent base. Margins entire below, 

 denticulate above. Midrib mediumly stout. Secondaries numerous, 

 branching from the midrib at angles of about 45 degrees, very thin but 

 prominent, somewhat irregular, eventually camptodrome. 



This species was described originally from the Raritan formation of 

 New Jersey, where it is not uncommon, although the exact horizon from 

 which it was collected is not known. It occurs also in the lower part of 

 the Tuscaloosa formation in western Alabama. Its unmistakable presence 

 in the Patapsco formation is of considerable interest since very few forms 

 are known to pass from the Lower into the LTpper Cretaceous. While it 



^ Saporta, Fl. Foss. Portugal, 1894, p. 186, pi. xxxiv, fig. 10. 

 . 31 



