80 THE FLORA OF THE DAKOTA GROUP. 



Mountains, where the ohler strata coverhig the ])riniary rucks are nearly 

 vertically upheave<l and their edges locally exposed to view. From west- 

 em Kansas the Dakota Group is covered by Upper Cretaceous and Tertiary 

 strata ; its continuity is thus proved by the identity of the plants found 

 both in Colorado and Kansas. 



Habitat: Ellsworth County, Kansas. No. 815 of the collection of the 

 nniseuin of the University of Kansas. 



Ficus Beckwithii Lesq. 

 Cret. and Tert. Fl., p. 46, PI. xvi, Fig. 5; PI. xvii, Figs. 3, 4. 



Ficus Halliana Lesq. 

 Cret. FL, p. 68, PI. xxviii, Figs. 3-9. 



Ficus primordialis Heer. 

 Phyll. Cr6t. du N^br., p. 16, PI. iii, Fig. 1 ; Lesquereux, Cret. and Tert. Fl., p. 45. 



Ficus ? angustata Lesq. 

 Cret. and Tert. Fl., p. 47. 



Ficus deflexa, sp. uov. 

 PI. Ill, Fig. 13 ; PI. XVI, Fig. 3. 



Leaves small, very thick, coriaceous, entire, broadly oval, rounded at 

 the petiole and abruptly declined to it ; pointed at apex ; primary nerves 

 stout ; secondaries thick, camptodrome ; petiole gradually thickened to its 

 base. 



The leaves are small, about 4™ long, 3"'" broad, with three to four 

 pairs of strong, j)arallel, opposite secondaries and a tliin basilar one, all 

 much curved in passing to the borders and along tliem, following them in 

 areoles ; nervilles thick, at right angles to the iierA'es and generally forking 

 at the middle. 



I do not know of any fossil species to which these leaves are strictly 

 comparable. But they are quite similar to those of F. hciigalka (F. hrn/fa- 

 lensis \A) of Avhich a leaf is reproduced by impression in Ettingshausen's 

 Flora of Bilin, PI. xxvi. Fig. 1. There is a difference only in the position 

 of the lowest jiair of primaries, which in the living species are derived from 

 the top of the jjetiole with the lower pair of secondaries at a great distance 

 above, whihi in the fossil leaves the lowest pair of primaries are sujira-bas- 

 ilar and parallel to the secondaries. Although this difference is marked, 



