87 



doubly scythe-shaped ; the medial nerve is as thick as in the former species, 

 a character which also separates it from P. acuta. 



Habitat. — Near Decatur, Nebraska, Hai/den, a single specimen. 



EmBOTIIRIUM (?) DAPHNEOIDES, Sp. 110V., PI. XXX, Fig. 10. 



Leaf coriaceous, oblong, narrow, gradually tapering downward, and deenrrent to the broad, medial 

 nerve ; borders slightly reilexed; nervation pinnate ; lateral veins closo, at an acnto angle of divergence. 



The specimen represents only the lower half of a thick, coriaceous, smooth, 

 entire, linear-lanceolate or narrowly-oblong leaf, which is gradually narrowed 

 downward, the borders slightly decurring along the enlarged medial nerve. 

 The preserved part is about 4 centimeters long and 1£ centimeters wide; 

 the medial nerve at base, with a narrow wing, is 3 millimeters broad ; the lat- 

 eral veins, three pairs, in an angle of divergence of 20°, ascend to and along 

 the borders, and appear to curve inward and join the upper ones by thin 

 ramifications. 



The fragment represents, apparently, the lower surface of the leaf, which 

 is smooth, and does not expose any details of areolation ; the leaf is bordered 

 by a narrow linear groove, as if the borders were slightly reflcxed. The 

 leaves of some Prolcincai, however, have a marginal groove of this kind 

 marked upon the upper surface along the borders. 



The relation of this leaf is uncertain. By its form and nervation, it is 

 comparable to the leaf of Embothrium salig?iu??i, represented in Heer's Flor. 

 Tert. Helv., (PI. xcvii, Fig. 35.) In the fossil leaves, the veins are closer and 

 more numerous. This fragment also resembles Andromeda Parlatorii, Heer, 

 Phyll., p. 18, PL i, Fig. 5, differing especially by more oblique and more 

 numerous secondary veins. 



Habitat. — Western Kansas, Sludge. 



Aristolochites dentata, Heer, PL xxx, Fig. 6. 



Aristolochites dentata, Heer, PhilL, loc, cit., p. 18, PL ii, Figs. 1-2. 



Professor Heer, in the Phyllites, has described, as indicated above, two 

 fragments of a peltate, triple-tierved leaf, with borders crenate-dentate, of which I 

 have seen one specimen only, which is figured in this report by the permission 

 of the Museum of Comparative Zoology of Cambridge, to which it belongs, from 

 the collection of Prof. Marcou. This specimen agrees fully with the descrip- 

 tion and figures of the author. The leaf is smaller, however, 4 centimeters 

 long, from the point of attachment of the petiole, which is marked by a cavity 

 enlarged on both sides, and placed 1 centimeter above the border-base of 



