480 Systematic Paleontology 



resembles G elastrophyllum alhcedomus Ward the two species are readily 

 distinguishable. 



Occurrence. — Patapsco Foemation. Mt. Vernon, Virginia. 



Collection. — TJ. S. National Museum. 



Celastrophyllum Hunteri Ward 

 Plate XC, Figs. 5, 10, 11 



Celastrophyllum Hunteri Ward, 1896, 15th Ann. Rept. U. S. Geol. Survey, 



1895, p. 358, pi. iv, fig. 9. 

 Celastrophyllum Hunteri Fontaine, 1906, in Ward, Mon. U. S. Geol. Survey, 



vol. xlviii, 1905, p. 494, pi. cviii, fig. 6. 

 Celastrophyllum (?) saliciforme Ward, 1906, in Fontaine, in Ward, Mon. 



U. S. Geol. Survey, vol. ^clviii, 1905, p. 494, pi. cviii, fig. 7. 



Description. — Leaves linear-lanceolate in outline, 7 cm. to 10 cm. in 

 length by 0.8 cm. to 2.0 cm. in maximum width, which is in the middle 

 part of the leaf. Apex and base about equally pointed. Margin finely 

 and sharply dentate. Midrib mediumly stout becoming thin distad, 

 curved. Secondaries numerous, thin, branching from the midrib at 

 angles of about 45 degrees, more or less forked, eventually camptodrome 

 (not craspedodrome as stated by Professor Ward). 



This species is somewhat variable in its relative proportions, the most 

 slender specimen found having been the basis for a distinct specific name. 

 It is similar to Celastrophyllum alhcedomus Ward, differing chiefly in its 

 much greater elongation. The broader forms suggest Celastrophyllum 

 angustifolium ISTewberry of the Earitan formation. 



Occurrence.— ^ATAV^co Formation. White House Bluff, Mt. Vernon, 

 Virginia. 



Collection. — U. S. National Museum. 



Celastrophyllum alb^domus Ward 

 Plate XC, Fig. 4 



Celastrophyllum albceclomus Ward, 1906, in Fontaine, Mon. U. S. Geol. Sur- 

 vey, vol. xlviii, 1905, p. 489 (footnote), pi. cviii, fig. 3. 



Description.—" Leaf ovate-lanceolate, rounded at the base and apex, 



unequal-sided, crenate-toothed, 4 cm. long exclusive of the petiole, which 



is wanting, 16 mm. wide at the middle; midrib strong and straight, 



