DESCRirTION OF SPECIES— J DGLANDEiE. 283 



It li :i III 11 u s It o s s 111 ii •• s I f ■■ i , Uug. 

 Plato LIV, Fig. 4. 



Jiliamnu/i nosfmamleri, Uiig., Gen. et Sp., p. 404. — Ileer, Fl. Tcrt. Ilolv., iii, p. 80, pi. cxxiv, figs. 18-20. 

 I'lijiUilea raamnokUa, Rossiii., IJeitr. 7.. Vurstpin., pi. viii, tigs. 30, :il. 

 lihamnua aizoidcs, Uug., Sillog-, ii, p. 17, pi. iii, f. 47 ?. 



I>oiivp8 narrowly obovate, obtusely pointeil, very entire; lateral nerves curving in passing to the 

 borders; nervilles tliiu. 



The shape of Ihe leaves, somewhat inequilateral, with the obUi.'^e ])oiiit 

 sliglitly turned to one 8i(l(>; their size also, five centimeters long and three 

 broad, the direction and relative distance of the lateral nerves, are the same 

 as in th(! leaves of this species, figured by Ileer from the Miocene of 

 Switzerland. Tlie average angle of divergence of the lateral nerves is 40"^ 

 to 50"; their simple bows follow quite near the borders. I am unable to 

 point out any diirercncc between this and the European leaves described 

 under this name. 



Habitat. — Black Buttes, Wyoming, in sandy shale above the main coal. 

 The only leaf found. 



TEREBIiNTHINEJ^. 

 JUGLANDEiE. 



The distribution of the species of this family in the geological times, 

 compared with that of our present flora, presents for Europe a peculiar 

 anomaly, and for North America a remarkable analogy. We find Juglans 

 already represented in the European Cretaceous by one species, described 

 by Heer, from Moletin. The leaflets are very large and with entire borders. 

 There is apparently also one species present in the Cretaceous of Nebraska, 

 for numerous leaflets of compound leaves have been referred, with doubt, 

 however, to this genus from the Dakota group. From the Eocene of Europe, 

 three species of Juglandites are described, in the Sezanne Flora by Count 

 Saporta, from leaflets either entire or minutely denticulate, both characters 

 represented in the leaflets of the same species, as if we had here the first 

 traces of denticulation in leaves of Juglans. Higher up in the Tertiary 

 formations, or from tli(> lowest part of the Jliocene to its end, European 

 l)aleontol()gists have found a very large numl)er of species of this family, 

 not less for Juglans than fourteen, represented by entire leaflets, ten by ser- 

 rate ones, and twelve by fruits, besides seven more, of uncertain affinity, 

 described by Massalongo. Of the genus Carya, they have, in the same Upper 



