56 



Dioscorem. 

 Dioscorea (?) cretacea, sp. now, PL xxviii, Fig. 10. 



Leaf coriaceous, entire, nearly round, slightly emarginate at the point, broader than long, round or 

 truncate at base ; veins apparently all from near the base, the outside ones curving parallel to tbo 

 borders, and somewhat branching ; the others parallel to each other, simple, curving in the same way 

 in ascending, connected in the upper part by arched nervilles, the inner ones aerodrome. 



The leaf is lacerated in the middle through, from top to base, and 

 therefore the nervation is not satisfactorily ascertained. The upper lateral 

 veins appear as branching from the destroyed middle nerve. According to 

 the remark of Saporta, this leaf is referable to both the present genera 

 Dioscorea and Pitsia. 



Habitat. — Western Kansas ; found in concretions, Mudge. 



Palmce. 

 Flabellaria (!) minima, sp. nov., PL xxx, Fig. 12. 



Rays narrow, splitting in lacinire ; veins prominent, parallel ; intermediate space concave, marked 

 with indistinct veinlets, parallel to the primary veins. 



The fragment shows four rays or laciniee, diverging upwards as if out 

 of the same central point, splitting in ascending, in the same manner as the 

 rays of palm leaves in the upper part, and thus enlarging fan-like. The 

 lines or nerves marking these divisions in their length are parallel, narrow 

 ridges, separated by concave grooves, having the appearance of the folds or 

 rays of Sabal leaves reduced to a very narrow proportion, Fig. 12 b enlarged. 

 If these fragments represent a species of palm, it is a very diminutive one. 

 They cannot be compared to gramen leaves on account of their fan-like 

 division. The substance is, if not thick, at least hard, firm, the surface pol- 

 ished and shining like culms of straw. This small fragment seems to indi- 

 cate the first traces of palms in our Cretaceous measures. 



Habitat. — Western Kansas ; found in concretions, Mudge. 



DICOTYLEDONEiE APETALEjE. 



Iteoidece. 



Liquidambar integrifolium, Lesqx., PL ii, Fig. 1-3 ; PL xxiv, Fig. 2 ; PL 

 xxix, Fig. 8. 



Leavos of medium size, coriaceous, deeply five-pal niately lobed ; divisions ovate-lauceolato obtuse, 

 entire, separated by obtuse sinuses. 



