LESQUEEEux.] PALEONTOLOGY LIGNITIC FLOEA SPECIES. 403 



what convex at the center. The species is represented by two leaves, one 

 of which is in a good state of j)reservatiou. 



The essential difference between this and the next consists in the thin 

 substance of its leaves; theveins scarcely ramified, and their divisions not 

 half as thick ; the surface smooth, not roughened by the secondary and 

 tertiary nervation, and one primary nerve the less. Differences of the 

 same kind are, however, remarked sometimes between leaves of the 

 same species of our time. In N. lufeum, for example, the upper surface 

 is generally smooth, and the nervation less distinct, while the lower 

 one is coarse, with the veins apparently thicker ; in the same species the 

 tissue of the leaves is thicker and harder in the floating leaves than in 

 those raised above water by longer pedicels. The difference of one nerve 

 the less might also be considered as of no value for a specific distinction. 

 However, in the numerous leaves of N. luteum, large and small, the 

 primary nerves are always of the same number — 21. Both these fossil 

 forms have no trace of a middle nerve ; at least this one has none ; but 

 the leaves representing the next described species has, between two of 

 the veins, a split, which may represent the medial nerve or take its place. 



Habitat — Sand Creek, A. Gardner. 



Nelumbium Lakesianxjim, sp. nov. 



Leaves coarse, thickish, peltate, exactly round, with the petiole cen- 

 tral ; borders turned down ; center concave, regular ; all the veins, (14,) 

 equal in thickness, equally diverging from the center to the circum- 

 ference, deeply marked, branching near the borders, crossed by thick, 

 flexuous nervilles at right angles and disjointed ; surface rough. This 

 species is represented by three specimens of the same form, two small 

 leaves and a much larger one. They differ from N.Buchi, Ett., (Fl. Mt. 

 Promina, p. 36, PI. ii, Fig. 1,) by the central jooint of attachment of the 

 petiole, the absence of a thick branching principal or middle nerve, &c. 



A number of nuts or fruits, which I think referable to the same spe- 

 cies, have been found at the same localities as the leaves. They are 

 cylindrical-oblong, truncate at base, with a small central mamilla, or 

 round sdar, representing the point of attachment at the base of the alve- 

 ola of the receptacle; covered by a thin, shelly integument, and obtusely 

 pointed. The point is crushed in all the specimens. They are compara- 

 tively of large size : nearly 2 centimeters long, 8 millimeters in diameter. 

 The forms of these fruits is somewhat like that of those of our JSF. 

 luteum ; they are proportionally longer, however, the shelly surface is 

 thinly lined or striate in the length ; the basilar scar marking the point 

 of attachment is 1 J centimeters broad, slightly conical or convex pointed, 

 with a rough surface. 



Habitat. — Golden ; discovered and communicated by A. Lalces. 



Magnolia Lesleyana, Lesqx. 



Kepresented by the upper part of a very large leaf, its widest part 9 

 centimeteus broad, rounded in tapering to a point ; lateral veins par- 

 allel, distant, at unequal distance, at the same angle of divergence, and 

 curving to and along the borders, as in the leaf described from Missis- 

 sippi in Proc. Phil. Soc, (vol. xiii, p. 421, PI. xxi, Fig. 1.) The more dis- 

 tant of the secondary veins are separated by shorter, more open, ter- 

 tiary veins, as marked upon the same figure. The tertiary nervation 

 and areolatiou are distinct, and evidently refer this fragment to a Mag- 

 nolia. 



Habitat. — G olden. 



