79 



the comparatively longer and narrower leaves, the prolongation of the middle 

 lobe twice as long as the lateral ones, the less oblique direction of the narrow 

 lateral lobes, and accordingly of the lateral nerves, the acute wedge-form of 

 the base of the leaves decurring along the petiole by a narrow border, and, 

 too, by the polished upper surface of the coriaceous leaves. The borders are 

 always entire, more or less irregulary undulate ; all the secondary veins camp- 

 todrome. The areolation of this species is also less uniformly rectangular 

 than in the former ones, and the divisions of the primary veins at a greater 

 distance above the base of the leaf. By this character this form is more inti- 

 mately related with the species of Sassafras described from the Miocene of 

 Europe, like 8. ferettianmn, Mass., which, in some of its leaves, has the 

 medial lobe narrowed toward the base in the same way as seen in our 

 Fig. 4. In Fig. 7, of PI. xxx, however, the base of the leaf is more enlarged, 

 less decurrent to the petiole ; the lobes more oblique, a deviation of type 

 which seems as a transitional form between this and the following species. 



Habitat. — Hills along Salina River, Kansas. The first specimen seen of 

 this species, which is copied in our Fig. 3, was sent from the collections of 

 the Smithsonian Institution, labeled "Presented by Prof. Mudge" From / 

 the directions of the professor, I visited the locality, and found a number of t- 



This and the following 



less perfect impressions of leaves of the same kind, 

 species are rarely represented in the collections. 



Sassafras acutilobtjm, sp. nov., PI. xiv, Figs. 1-2. 



Leaves snbcoricaceous, of the same consistence as the former species ; lateral lobes lanceolate-pointed, 

 diverging nearly at a right angle from tho medial nerve ; primary nerves more or less disjointed at the 

 base. 



I considered at first this species as a variety of the former. It is, how- 

 ever, so far different in all its parts, essentially in its general outline, its sharply 

 acute, more diverging lobes, its thin secondary veins uniformly curving along 

 the borders, that it has the same right to be considered as a species as the 

 other forms described in this paper. As in S. mudgei, the primary nerves are 

 comparatively thin; and both surfaces of the leaves, though distinctly marked 

 by the nervation, are not as rough as in the other species, or more generally 

 smooth. 



Habitat. — With the former. 



V"S 







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