Maryland Geological Survey 491 



of Fontaine, the first and the last based on very sparse material of 

 a fragmentary character which as nearly as it admits of comparison 

 is identical with the type material of the second, in fact Professor 

 Fontaine states that the last two may be identical, a point upon which 

 there can be but little doubt. 



The remains of these leaves are fairly common at various outcrops of 

 Patapsco age near both banks of the Potomac Eiver but have not been 

 found either to the northward in Maryland or to the southward in 

 Virginia. They undoubtedly represent the ancestral form of Aralia 

 Newherryi Berry, a common Upper Cretaceous species which extends 

 from the Earitan through the Magothy formation, and they may be 

 compared more particularly with various forms of this species figured by 

 the writer^ from Cliff wood Bluff, New Jersey. The present species does 

 not differ greatly from the n&xt, such differences as are observable being 

 discussed under the latter. 



Occurrence. — Patapsco Fobmation. Deep Bottom, near Brooke, 

 Virginia; near Glymont, Stump Neck, Maryland, 



Collections. — U. S. National Museum, Maryland Academy of Science. 



Arali^phylldm magnifolium Fontaine 

 Plate XCVI, Figs. 1-5 



Aralicephyllum magnifolium Fontaine, 1890, Mon. U. S. Geol. Survey, vol. 



XV, 1889, p. 318, pi. clix, figs. 9, 10. 

 AralicBphyllum aceroides Fontaine, 1890, Mon. U. S. Geol. Surv., vol. xv, 



1889, p. 319, pi. clvi, fig. 11; pi. clxii, fig. 2. 

 Aceripfiyllum araUoides Fontaine, 1890, Mon. U. S. Geol. Surv., vol. xv, 1889, 



p. 321, pi. clxiii, fig. 8. 

 Hedercephyllum angulatum Fontaine, 1890, Mon. U. S. Geol. Surv., vol. xv, 



1889, p. 324, pi. clxii, fig. 1. 



Description. — Leaves usually of large size, ovate to orbicular in general 

 outline, ranging from^ 8 cm. to 17 cm. in length by from 8 cm. to 

 18 cm, in greatest width, usually longer than wide, Palmately trilobate 

 with subordinate lobes developed exactly as in the preceding species, 

 but to a less degree and frequently not at all. Lobes broadly ovate in 



^ Berry, Bull. N. Y. Bot. Garden, vol. iii, 1903, p. 93, pi. xliv. 



