DESCRIPTION OF SPECIES— OLEACE^. 229 



the teeth of the borders are rather obtuse and distant. The leaves from the 

 Baltic Tertiary are narrower. The broad base of fig. 2 shows the leaf to 

 be sessile. 



Habitat.— The fragment represented by fig. 1 is from Evanston, Wyom- 

 ing; that represented by fig. 2 from six miles above Spring Canon, Montana 

 {Dr. A. a Peale). 



Fraxinus praedicta, Heer. 



Plate XL, Fig. 3. 



Fraxinm pradicta, Hoer, Fl. Tert. Helv., iii, p. 92, pi. eiv, Cj;s. 12, 13 ; Mioc. Bait. Fl., p. 89, pi. xxiv 6- 

 '.i4.— Lesqx., Annual Report, 1873, p. 414. "' 



Leaf small, lanceolate and acuminate upward, narrowed to the base, distantly irregularly dentic- 

 olate; secoudary nerves caniptodrome, joined to the teeth by nervilles. 



The fragment represents a small leaf about four centimeters long, twelve 

 millimeters broad, with a coarse irregular nervation, very similar to that of 

 fig. 13 b of Heer's {loc. cit:). The only difference in the characters of this 

 leaf is its more attenuated base, more narrowly cuneate than in any of the 

 leaves figured by the author. I consider it, however, as representing the 

 same species. 



HABiTAT.-South Park, near Castello's Ranch, Colorado {Dr. F. V. 

 Hayden). 



Though the two new species mentioned above are not figured here, I 

 give a short description of those fine leaves. 



Fraxinns Focvnica, sp. noT. 



Leaves of large size, subcoriaceous, distantly obtusely dentate or merely undulate ou the borders, 

 broadly lanceolate, rounded in narrowing to the inequilateral base ; nervation snbcamptodron.e. 



The largest of these leaves is about fifteen centimeters long (the point 

 is broken), and five centimeters broad below the middle, where it is the 

 widest; the other leaves are somewhat smaller, exactly of the same form. 

 The secondary nerves, on an open angle of divergence, nearly parallel and 

 equidistant, generally curve in passing toward the borders, where they form, 

 close to them, a series of simple bows, from which emerge the nervilles, which 

 enter the blunt distant teeth. A few of tjiese secondary nerves, however, 

 curve and enter the point of the teeth; tliey have generally also a few branches 

 in the upper part. The nervilles are distinct, irregular in direction, much 

 divided; the areolation, as far as it is discernible, is in irregularly polygonal 

 meshes. The base of the leaf is cuneate on one side, descending lower, and 

 rounded on the other, or rounded on both sides, which then are nearly equal; 



