DESCRIPTIONS OF SPECIES. 125 



are retained in the fossils before us, we find an entire correspondence with 

 the living genus Cornus, and refer these leaves to that place in the botan- 

 ical series with as much confidence as the foliary appendages alone can 

 give. 



Lesquereux suggests that this plant is identical with his Juglans 

 rhamnoides (Tert. Fl., p. 284), but after a careful comparison of specimens 

 I am compelled to consider them as distinct. The nervation of these leaves 

 is that of Cornus and not of Juglans, and no species of the latter genus 

 has the long, strong petiole on which the blade is decurrent, as in the 

 specimens before us. 



Formation and locality: Tertiary (Eocene!) Fine laminated sand- 

 stone, with Platanus Haydenii and Populus Nebrascencis. Yellowstone River, 

 Montana. 



Nyssa (?) cuneata Newb. 



PL XVII, figs. 4-6. 

 Ficus ? cuneatus Newb. Bost. Journ. Nat. Hist., Vol. VII (1863), p. 524. 



"Leaves obovate or elliptical, shortly acuminate at summit, wedge- 

 shaped at base, decurrent onto the petiole; nervation distinct, flexuous, 

 reticulated; midrib strong; lateral nerves eight or nine pairs gently arched 

 upward, the lower ones curved at the extremities, anastomosing near the 

 margin, the upper ones forked above the branches, meeting and forming 

 a coarse network." 



The specimens of this plant are too few and two obscurely preserved 

 to permit any accurate determination; for the present it may be left in the 

 genus Nyssa, to some species of which it certainly bears a close resem- 

 blance, both in outline and nervation. 



Formation and locality: Cretaceous (Puget Sound group). Orcas 

 Island, Washington. 



Nyssa vetusta Newb. 



PL I, fig. 2; IV, 'fig. 4. 

 Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 11; Ills. Cret. and Tert, PI. 



(1878), PL II, fig. 2, under Magnolia obovata. 

 Magnolia obovata Newb. Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 15; 



Ills. Cret. and Tert. PL (1878), PL IV, fig. 4. 



"Leaves large, obovate, entire, thick, and smooth, pointed and slightly 

 decurrent on the petiole; nervation strong; midrib straight and extending 



