PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 513 



or in part undulate ; nervation strongly defined butopen 5 about 7 branches 

 on each side of the midrib, the lower two or three giving off branches 

 below, the upper simple, arched upward, terminating in the margin, 

 the intervals between the branches spanned by numerous, generally 

 simple, tertiary nerves. 



Formation and locality. — Tertiary strata, Tongue Eiver, Wyoming. 

 Collected by Dr. Hayden. 



51. VlTIS ROTUNDTFOLTA, n. Sp. 



Leaf broadly rounded or sub-triangular in outline, cordate at the base, 

 and with an acute point at the summit, and at the extremity of each of 

 the angles ; intermediate portions of the margin coarsely and bluntly 

 toothed; strongly three-nerved; tertiary nervation distinct and iiexu- 

 ous. 



Formation and local it y.— Tertiary strata, Admiralty Inlet, Alaska. 

 Captain Howard, U. S. ^. 



52. Magnolia rotundifolia, n. sp. 



Leaves petioled, large (8 inches in length by G inches in width), round- 

 ovate in outline, rounded or blunt-pointed above and slightly wedge- 

 shaped below; margins entire; nervation open and delicate; 4 to 6 

 lateral branches given off from the midrib at remote and irregular dis- 

 tances, curving gently upward, and forming festoons near the margin. 



Formation and locality. — Laramie group ; Fisher's Peak, New Mex- 

 ico. Collected by Dr. Hayden. 



53. Magnolia angustifolia, n. sp. 



Maf/noUa atienuata. Web. Lesq. Tert. Flor., p. 250. PI. XLV. Fig. 6. 



Leaves petioled, 1 foot or more in length, by 2 to 3 inches wide in the 

 middle; lanceolate, pointed above, gradually narrowed to the base; 

 margins entire ; nervation sparse ; midrib straight, lateral nerves few, 

 thin, gently arched, camptodrome. 



Formation and locality. — Laramie group, Fisher's Peak, K Mex. 



54. ZlZYPHUS LONGIFOLTA, n. Sp. 



Leaves four to seven inches long by six to twelve lines wide ; lance- 

 olate, long-pointed, wedge-shaped at base and loug-petioled ; margins 

 waved, or more or less distinctly toothed ; midrib well defined from base 

 to summit ; basal pair of lateral nerves approaching closely to the margin 

 near the middle of the leaf, then curving gently inward, and anastomos- 

 ing with the higher lateral nerves, of which there are three or more set 

 alternately and curving upward, forming a festoon near the margin ; 

 tertiary nerves very finely reticulated. 



Formation and locality. — Eocene Tertiary, Green Siver, Wyoming. 

 Collected by Dr. C. A. White. 



55. Aralia macrophylla, n. sp. 



Leaves large, long-petioled, palmately five parted from the middle 

 upward, divisions conical in outline, sometimes entire, often remotely 

 Proc. Nat. Mus. 82 33 March 21, 1 § 8 3. 



