1888.] PKOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 91 



is thought by the collector, Mr. Johnson, to be of Pliocene Age. It be- 

 longs, as I am informed by Mr. W. J. McGee, of the IT. S. Geological 

 Survey, to the Grand Gulf of Hilgard, a formation usually regarded as 

 Miocene, but concerning the age of which we really know very little, 

 and all determinations of position must be regarded as tentative until 

 more complete data are obtained. 



The geologic horizon from which the Palmoxylon Quemteclti Felix 

 was obtained is also in doubt. Hovey, who has contributed a paper on 

 the Geology of Autigua,* inclines to regard it as belonging to the 

 younger Pliocene, but Felixt thinks it may possibly be older. It would 

 be interesting if this locality could be correlated with that from Louisi- 

 ana, but in the present state of our knowledge this is manifestly im- 

 possible. 



*Aui. Jomn. Sci., Vol. xxx, 1639, pp. 75-85. L. c, p. 8. 



Proc.N. M. 88 7 » „ _ 



