with Descriptions of Xi w Sp< ci a of Fossil P 15 



Magnolia obovala. (n. Bp.) 



Leaves large, obovate, entire, thick and Bmooth; pointed and 

 slightly decurrent on the petiole; nervation strung; midrib Btraighl 

 and extending to the summits ; lateral nerves pinnate, set al 

 what unequal distances, straight and parallel below, forked and in- 

 osculating above, forming afestoon parallel with the margin ; I 

 tiary nerves forming an irregular network of polygonal and rela- 

 tively large areoles. 



Of this species there are numerous specimens in the colli 

 tions made by Dr. Harden, in as good preservation as the ma- 

 terial in which the} 7 are fossilized will permit. The uei 

 is strongly marked, and all its more prominent characl 

 appreciable in the fossil as they were in the fresh !■ 



In nervation, consistence, and outline, these leaves musl lia 

 been strikingly like those of some of the Chinese magno 

 Jif. purpurea, &c, which have obovate leaves, and I have pro- 

 visionally grouped them together. Without the fri 

 least leaves preserved in an argillaceous sediment in which the 

 finer details of nervation are given, the affinity 

 however, be considered to some extent donbtful- 



Formation and Locality. Red ferruginous sandstone 

 Lower Cretaceous formal ion, Blackbird Hill. Nebraska, 

 Harden.) 



Acerites prisliiuis. | 



Leaves petiolate, cordate al the base, five-lobed, lo 

 acute (?); five strong and nearly equal veins radiat< 

 into the lobes. The small ner distributed o 



in a fine network of which the meshesare sub 



Tl. eimens which I have of this planl • 



entire outline of the leaf. In general form tl 

 have resembled thoseof Ac r 

 of A. pseudoplatanus of Europe, but ai 

 pie than those of either of th 

 Acer described fro n the Tertiar 



