MUSEUM OF COMPARATIVE ZOOLOGY. 57 
nerves being opposite, from above the decurring base ; borders lobate, denticu- 
late, the lobes short, denticulate around. 
Species resembling much C. tomentosa, Linn., in the form of the leaves, the 
divisions of the borders, the decurring base, and the nervation, differing by the 
leaves being generally less deeply lobed, and the teeth shorter. The leaves 
vary from 73 to 11 cm. long, 4 to 73 cm. broad below the middle, the widest 
part. One of the leaves has the petiole or part of it preserved, 4 cm. long. 
4 specimens. 
116. Crataegus antiqua, Heer. As far as can be seen, the leaves are referable 
to this species, agreeing with it by the form, size, and nervation. The borders, 
however, are mostly destroyed, and the teeth, apparently obtuse, rather than 
acute as in Heer’s species, Fl. Arct., I. p. 125, Plate L. figs. 1, 2. 5 specimens. 
117. Asalanchier typica, Lx., var. A simple leaf a little smaller than the 
one figured in U. S. Geol. Surv. of the Terr., VIII., Plate XL. fig. 11, from 
the Green River Group, and with the teeth smaller and pointed. I refer it 
to the same species, but it may differ. The nervation is somewhat obscure. 
1 specimen. 
SUMMARY. 
The collection of fossil plants from which the above data have been 
derived was made at Golden, Colorado, by Mr. A. Lakes, and contains 
873 specimens. The number of fragments of vegetable examined for 
determination is 1,044. They represent 118 species, or vegetable forms 
considered as species, 28 of which are admitted as new species and de- 
seribed above, and 32 as new for the Flora, of the Laramie Group, but 
known from other localities, making therefore for that Flora an addition 
of 60 species. Of those already known from localities outside of the Lar- 
amie Group, 11 are American (3 from Carbon, 3 from the Green River 
Group, 5 from Evanston), and 21 are European. All are of Tertiary 
age, mostly observed in the Lower Miocene ; two of them are identified 
with Sezanne species or Eocene. 
Of the species described above from Golden, as of those formerly 
known from the Laramie Group, either by the publications of Dr. New- 
berry or of my own, none is ideutified with any of those of the Middle 
Cretaceous (Cenomanian) or of the Dakota Group. In two only, a 
marked affinity has been recognized and mentioned ; Populus elliptica, 
Newby., Later Extinct Flora, Illust., Plate III. figs. 1, 2, which the 
author says has a striking resemblance in general form to that of P. 
cuneata, is closely related to P. arctica, Heer, of the Arctic Miocene ; 
and Platanus primeva, Lesqx., U. S. Geol. Surv. of the Terr., VI. p. 69, 
Plate VII. fig. 2, is not less closely allied to Platanus Guillelme, or 
