lesqbereux.1 . ENUMERATION OF CRETACEOUS PLANTS. 351 



two species with entire leaves, A. Towneri and A. concreta, were found 

 near Clay Center, except A. tripartita, which also is from Fort Harker. 

 These five new types of Cretaceous plants proves the richness of this 

 remarkable flora, and their local distribution assures for future explora- 

 tions a rich field for new discoveries. 

 Habitat. — South of Fort Harker, Chs. Sternberg. 



Hedkra ovalis, Lesqx,, Cret. Flora, p, 91. PI. XXV, fig. 3, and PI. 



XXVI, fig. 4. 



Leaves coriaceous, entire, oval, rounded at the point, narrowed to 

 the base, pinnately yierved ; middle nerve thiclc; secondary veins alternate, 

 irregular in distance, more or less numerous ; ar eolation in large irregular 

 meshes. 



These leaves have an evident relation to those published by Professor 

 Heer under the name of Chondrophyllum NordensJcioldi and C.orbicu latum, 

 from the upper Cretaceous of Greenland Foss. in his Flor., Arct., Ill, pp. 

 114 and 115, PI. XXXII, figs. 12 and 13, reconstructed from fragments. 

 When the specimens are compared, they may prove to be the same spe- 

 cies, for, though I have formerly considered the leaves as representing 

 one species only, for the fragments show a great diversity in the charac- 

 ters of the nervation, there is, however, too great a difference between 

 the multiple much-divided secondary veins on a broader angle of diverg- 

 ence of PI. XXV, fig. 3, and the more simple nervation of PI. XXVI, 

 fig. 4, to permit considering them as representing the same species. 



Hedera Schimperi sp. nov. PI. VII, fig. 5. 



Leaf subrenif or m, broader than long, rounded at the top, abruptly nar- 

 rowed or nearly truncate to a short petiole, three-nerved, from above the 

 base ; lateral veins curving in various directions toward the borders, 

 anastomosing by thiclc branches and nervilles with the divisions of the short, 

 distant secondary veins, curving along the borders and entering by short 

 veinlets the distant, slightly marlced denticulations of the borders. 



A fine leaf of coriaceous substance, six centimeters long without the 

 petiole (which is only seven millimeters long and enlarged at its base), 

 six and one-half centimeters broad, with borders minutely denticu- 

 late, the teeth at different distances and of various size, and a trifid 

 nervation from a short distance above the border base of the leaf; the 

 lateral veins curve, the one inside toward the middle nerve, the other 

 outside toward the border and branching nearly at right angle, they anas- 

 tomose with nervilles or divisions of the secondary veins and form an 

 areolation irregular and mixed with angular, square, or polygonal 

 meshes. This areolation partakes of the characters of that of the former 

 species. It is somewhat analogous to that of Greviopsis tremulwfolia, 

 and of Cissus ampelopsidea Sap., and recognizable also in the following. 



Habitat. — South of Fort Barker, Chs. Sternberg. 



Hedera platanoidea, sp. nov. PI. Ill, fig. 3. 



Leaf small, broadly ovate, truncate at the base, round at the top, short 

 petioled, entire ; nervation trifid from a short distance above the base; pri- 

 mary veins craspedodrome. 



This leaf five centimeters broad, four and one-half centimeters long 

 without the short enlarged petiole, has its borders entire, though 

 the primary and secondary veins reach to the borders and enter them ; 

 the two lateral primary nerves force the border slightly outside, and the 

 leaf appears thus sublobate or enlarged in the middle; the lower branches 



