FOSSIL FLORA. 745 



which is about one-fourth of its length from the sinus, it is 2.5 cm. broad. 

 The lateral lobes are about 3.5 cm. long, not enlarged upward. At base 

 they are 1 cm. broad, from which point they taper gradually to a slender 

 acuminate apex. The nervation has been described in the diagnosis, and 

 may also be clearly made out from the excellent figure. 



It is hardly possible to compare this species with described forms, from 

 the fact that it is so fragmentary that the perfect form can not be made 

 out. The characters of the larger middle lobe and the very much smaller 

 lateral lobes seem to be so marked that it is strongly separated from any 

 described species. Aralia angustiloba Lx., 1 from the Chalk Bluffs of Cali- 

 fornia, perhaps is closest to this species, yet it differs markedly. It will be 

 necessary to wait for additional material before its exact character can be 

 made out, 



I have named this species in honor of Mr. George M. Wright, one of 

 the collectors of this and many other valuable specimens in the Yellowstone 

 National Park. 



Habitat: Fossil Forest (No. 22c of section); collected by Wright and 

 Weed, September 20, 1885. 



Aralia notata Lx. 

 PI. G, tig. 1. 



Aralia notata Lx.: Tert. Fl., p. 237, PI. XXXIX, figs. 2-4. Ward: Types of the 



Laramie Fl., p. 60, PL XXVII, fig. 1. 

 Platanus dubia Lx.: Hayden's Ann. Rept. 1S73 (1S74), p. 406. 



The collections contain about 50 specimens that evidently belong to 

 this species. None of them are absolutely perfect, yet the general character 

 can be made out. They come from three localities, one of which, the 

 Yellowstone below Elk Creek, was given as a type locality by Lesquereux. 2 



There appears to have been a tendency among later writers to regard 

 this as the same as Newberry's Platanus nobilis 3 from the Fort Union group, 

 which indeed it much resembles. They were both very large species, not 

 often preserved entire, but they seem to differ essentially. On this point 

 Lesquereux says: "This species (A. notata) seems very closely allied to 



1 Mem. JIus. Conup. Zool., Vol. VI, No. 2, PI. V, tigs. 4, 5. 



2 Tert. Fl., p. 237. 



'Later Extinct Flora, p. Cu. 



