888 



W. LINDGREN—F. H. KNOWLTON 



Twenty species have also been identified in other formations, 

 the six remaining forms making up the fifty-six species being of 

 doubtful afifinities. The following hastily prepared table shows 

 the distribution of those forms. 



TABLE SHOWING IDENTIFICATIONS OF FOSSIL PLANTS FROM INDEPENDENCE HILL, 



CALIFORNIA. 



Species 



Salvinia Alleni Lx 



Ficus tilmfolia Lx 



Ficus cf . F. popzilina Heer . . 

 Ficus cf. F.planicostata Heer 



Ulmus Californica Lx 



Populus Zaddachi Heer 



Castanea Ungeri Heer 



Juglans ci. J. picroides Heer. 



Acer nequidentatum Lx 



Viburnum tilioides Ward . . . 

 Viburnum elongatum Ward . 

 Vibui'nuni Whyt?iperi Heer. 

 Cornus hyperborea Heer .... 



Aralia Whitney i I>x 



Persea pseudo Carolinensis Lx 

 Laurus Califor^iica Lx . . . 

 Magnolia Californica Lx . 

 Magnolia lanceolata Lx. . . 



X? 



X? 



.9 



"o"2 



a o 



1-1 



X 



Green River only. 



Laramie only. 



% Miocene. 

 %. Miocene. 

 Miocene only. 



Fort Union only. 



Miocene sp. 

 % Miocene. 



California only. 



A study of this table shows that twelve species have been found 

 in the Miocene in various parts of the world. Of this number 

 five are almost exclusively confined to this horizon, and may be 

 regarded as typical Miocene forms. 



Only nine of the nineteen forms are found in the Pliocene, 

 and two of these are from the so-called Pliocene of California 

 and therefore have little weight. None of these nine species 

 is confined to this horizon. It will be observed that five 

 species are accredited to the Laramie ; of this number two are 

 from Cherry Creek, Oregon, the age of which is only provision- 

 ally regarded as Laramie, the probability being that it is younger. 

 Another species, Vibur?iu?n Whymperi, is doubtfully identified in 

 the Laramie, being a characteristic Miocene species. A single 



