136 STANTON & KNOWLTON LARAMIE AND RELATED FORMATIONS. 



same direction. It will be shown later that the Black Buttes beds should 

 be regarded as true Laramie, and consequently the series now under con- 

 sideration is placed in the same category. Besides the nine Black Buttes 

 species, there are seven additional that occur at other Laramie (including 

 Judith River) localities. Five of the Converse county species were origi- 

 nally described from the Fort Union beds near the Yellowstone, and two 

 of these are also known from the Eocene Wasatch. 



EVIDENCE OF THE FLORA. 



The plants found in these beds also afford evidence of considerable 

 importance and interest. On combining the various species obtained 

 within the area, together with several secured by Mr Hatcher, which we 

 did not find, we have the following list of twenty-five forms : 



Alga (determination uncertain). 



Equisetum sp. 



Asplenium, n. sp. 



Salvinia, n. sp. 



Cyperus sp. 



Sabalites gray anus, Lx. 



Palmocarpon commune, Lx. 



Palmocarpon, n. sp. 



Platanus raynoldsii, Newb. 



Salix sp. 



Quercus cinerioides, Lx. 



Quercus sp. 



Myrica torreyi, Lx. 



Myrica, 2 sp. no v. 



Trapa (?) microphylla, Lx. 



Aralia notata, Lx. 



Aralia, 2 sp. no v. 



Viburnum whymperi, Heer. 



Viburnum, n. sp. 



Viburnum rotundifolium, Lx. 



Castalea, 2 sp. nov. 



Rhus, n. sp. 



Four of the above-mentioned forms, Sabalites qrayanus, Palmocarpon 

 commune (?), Palmocarpon sp. nov., and Platanus raynoldsii, were collected 

 b}^ Mr Hatcher and not found by us. One of them (Platanus raynoldsii), 

 represented by a large number of specimens, comes from just above the 

 Ceratops beds, according to Hatcher. As this is a typical Fort Union 

 plant, the horizon is undoubtedly near the one from which we obtained 

 the rich Fort Union flora. 



In case of the other forms obtained by Mr Hatcher, as they are labeled 

 simply Converse county, we are unable to correlate them exactly with any 

 of our localities. There is, however, no doubt about their being properly 

 referred to this general section and included in this connection. 



Of the remaining 24 forms it has been possible to identify satisfactorily 

 only 8 species with forms before known, and one of these is from an 

 unknown locality, thus having less than one-third of the total number 

 on which to ascertain the bearing of the plants as to the question of age. 

 Of the 7 remaining species, three are found at Black Buttes, in the vicinity 

 of the Agathaumus bed, and one species ( Viburnum whymperi) is con- 

 fined to these beds, at least in this country. It is probably the most 



