89 

 Diospyeos anceps, Lesqx., PL vi, Fig. 6. 



Leaf coriaceous, narrowly oval, obtusely acuminate ; borders entire ; nervation pinnate, camptodrome. 



Quercus anceps, Lesqx., American Journal of Science and Arts, loc. cit., p. 96. 



Leaf of medium size, 3£ centimeters wide, about 9 centimeters long, 

 narrowly oval, contracted to a short, obtuse acumen ; borders perfectly entire; 

 lateral veins deeply marked, curving to and along the borders, simple ; sur- 

 face smooth, marked by continuous nervilles, perpendicular to, and anasto- 

 mosing in the upper part with the veins. 



The reference of this leaf to Quercus was indicated by its specific name 

 as very doubtful. Its form is much like that of Diospyros lancifolia, Lesqx., 

 as figured by Heer in his Vancouver Flora, (PI. i, Figs. 10-12, and PI. ii, 

 Figs. 1-2.) This leaf is, however, obtusely acuminate ; its substance is 

 thicker, and the veins are at a more equal and greater distance, curving 

 nearer to the borders. Diospyros primceva, Heer, (Phyll. du Neb., p. 19, PI. i, 

 Figs. 6-7,) differs essentially from this leaf by its undulate, secondary thinner 

 veins, separated by shorter tertiary veins, which divide the nervilles. The 

 type is different. The reference of our leaf is still uncertain ; it may repre- 

 sent a kind of Laurus (?). 



Habitat. — Ten miles below Lancaster, Salt Creek, Nebraska, Hayden ; 

 two fragments. 



Diospyeos eotundifolia, sp. nov., PI. xxx, Fig. 1. 



Leaf snbeoriaceous, entire, nearly round, pinnately-veined; secondary veins parallel , camptodroruo. 



The species is represented by a fragment of a leaf of which the lower 

 part is destroyed. It is about 7£ centimeters long, 7 centimeters wide, 

 with a narrow middle nerve and six to seven pairs of lateral veins, on an 

 angle of divergence of 50° to 60°, branching and curving at a distance from 

 the borders, and forming, by their divisions, a double festoon along them. 

 The veins are joined by coarse or thick fibrillar nearly at a right angle to 

 them, but disconnected, and forming, by divisions and subdivisions, a net- 

 ting of very small square or polygonal areola?. The secondary veins and the 

 nervilles also are deep, and mark the surface of the leaf with wrinkles and 

 undulations. This fine leaf has some relation of form and nervation with 

 Diospyros styracifolia, Sap., a leaf of the Lower Eocene of Montpellier, a 

 sketch of which has been obligingly communicated to me by the author. I 

 do not know of any other fossil species to which this leaf could be compared 

 but, by its form, to the leaf of Juglans{}) debeyana, (PI. xxiii, Fig. 2, of 1 his 



.12 L 



