464 Systematic Paleontology 



Menispermites virginiensis "Ward, 1895, 15th Ann. Rept. U. S. Geol. Surv., 

 p. 360, pi. iv, fig. 8 (non fig. 7). 



Menispermites virginiensis Fontaine, 1906, in Ward, Mon. U. S. Geol. Sur- 

 vey, vol. xlviii, 1905, pp. 504, 528, 534, 557. 



Description. — The type of this species from near Brooke, Va., is a 

 fragment of a large leaf about 15 cm. in diameter. The preservation 

 is such that its peltate character cannot be made out with certainty the 

 specimen having the appearance of having a deeply auriculate overlap- 

 ping base, but this is probably due to maceration or folding, as the 

 additional specimens since found which resemble it very closely are 

 distinctly peltate. 



General outline orbicular, about 10 cm. in diameter; leaf substance 

 thick; margin inclined to be undulate or obscurely crenulate. Point of 

 attachment to the petiole about 1/3 of the diameter distant from the 

 margin. Veins radiate, somewhat flexuous, stout, nine or ten in number, 

 dichotomously forking. 



This species is very suggestive of certain Dakota G-roup forms which 

 Lesquereux described as species of Menispermites^ e. g., M. grandis 

 and M. cyclophyllum. Poorly preserved remains have been found at a 

 number of localities in Virginia and Maryland in beds of Patapsco age, 

 and its resemblance to N. primceva Berry from the Magothy formation 

 suggests an ancestral relationship. 



Occurrence. — Patapsco Formation. Ft. Foote (?), Federal Hill 

 (Baltimore), Overlook Inn Road, Maryland; Mt. Vernon, Hell Hole, 

 72-mile post, Brooke, Virginia. 



Collections.- — TJ. S. National Museum, N. Y. Botanical Garden and 

 Goucher College. 



ISTelumbites tenuinervis (Fontaine) Berry 

 Plate LXXXII, Figs. 1, 2 



Menispermites tenuinervis Fontaine, 1890, Mon. U. S. Geol. Surv., vol. xv, 



1889, p. 322, pi. clxii, fig. 8. 

 Menispermites virginiensis "Ward, 1895, 15th Ann. Rept. U. S. Geol. Surv., 



p. 360, pi. iv, fig. 7 (non fig. 8), 

 Menispermites tenuinervis Fontaine, 1906, in "Ward, Mon. U. S. Geol. Surv., 



vol. xlviii, 1905, pp. 496, 557, pi. cix, figs. 2, 3. 



