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, diileriug by the 

 leaves being generally less deeply lobed, and the teeth shorter. The leaves 

 vary from 7| to 11 cm. long, 4 to 7^ 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. Cratcegus 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 Beer's species, Fl. Arct., I. p. 125, Plate L. figs. 1, 2. 5 specimens. 



117. Ainalanchier tijpica, 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- 

 scribed 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 identified 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 primcBva, Lesqx., U. S. Geol. Surv. of the Terr., VI. p. 69, 

 Plate VIL fig. 2, is not less closely allied to Platanus Guillelmce, or 



