78 THE FLORA OF THE DAKOTA GROUP. 



reaching the petiole, which are not decurrent to it, and ])\ the ol)tuse apex. 

 Everything considered the leaf is much like Proteoldes daplmogenoides Heer, 

 as figured in ray Cret. Fl., PI. xv, Fig. 1. The leaves of this species are 

 merely smaller, the median nerve much thinner and the secondaries totally 

 obsolete. The species has also a marked degree of relation to Fkni; Fal- 

 conieri Heer,^ li-om the Miocene of England. 



Habitat: Ellsworth County, Kansas. No 8.^3 t»f the museum of the 

 University of Kansas; E. P. West, collector. 



Ficus Berthoudi, sp. nov. 

 PI. XII, Fig. 3. 



Leaves long, lanceolate, tapei'ing upward from the middle to an acute 

 point, gradually narroAved to the base; primary nerve thick in its lowest 

 part, becoming narrow above the middle ; secondaries very oblique, distinct, 

 alternate, parallel, curved in traversing the blade, following the borders in 

 long bows. 



The leaf is is'^"' long, 4*"° broad in the middle, not of very thick sul)- 

 stauce, being subcoriaceous. ' The primary nerve is much enlarged fr<^)m the 

 middle to near the base; the lower secondaries are more oblique, ?>h° of 

 divergence, slightly inclined downward in reaching the midril), and follow 

 the borders in long curves, while the upper ones, a little more open, 40° 

 of divergence, cui-A'e and anastomose along the borders in simple, osculat- 

 ing bows ; the uervilles are very thin at right angles to the secondaries, and 

 mostly simple. 



In form and type of nervation the leaf is related, like the preceding 

 one, to Ficus ehnr/dfn Ilosius (loc. cit.), from which it essentially differs in 

 being largest in the middle and gradually narrowed upward and downward 

 in the same degree, the leaves of F. ehmgata being broadest above the base 

 and rounded in naiTowing to the petiole, which they reach in a curve and 

 not decurrently; also by the secondaries being more approximate in the 

 iipper part of the leaf, the lower more oblique, curving higher along the 

 borders; and finally, by the thinner substance of the leaves. 



This peculiar section of Ficus is represented in the Senouian Flora of 

 Westj)halia by at least six species, and by two others in that of the Cenoma- 

 nianof Moletein, one of which, F. MnhVinna Heer, is also closely related to 

 F. Dcsorl Heer. It is therefore not surprising to find in the Dakota Group a 



'Fl. of Bovey-Tracy, Phil. Trans., vol. 152, pt. 2, p. 1060, PI. lxiii, Fit;, la; PI. LXiv, Figs. 6, 7; PI, 



Lxvi, Fig. 4. 



