636 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.54. 



bibliography was published by me in 1916/ can not be accepted with- 

 out reservation. 



Practically all of the fossil species of Diospyros and most of the 

 numerous existing species belong in mesophytic environments. Thus 

 our American Diospyros virginiana Linnaeus is a member of the de- 

 ciduous forest association of the southeastern United States, extend- 

 ing westward a short distance into the prairie States along the bot- 

 toms of the principal streams. Some modern species, as for example 

 Diospyros texana Scheele of Texas and Mexico, are found under 

 more arid conditions, but like certain existing species of Rhamnus, 

 they are believed to indicate relatively modern specialization of 

 habitat in a direction away from the normal habitat of the two 

 genera. 



Plesiotype.—C2it. No. 35290, U.S.N.M. 



EXPLANATION OF PLATES. 

 Plate 94. 



Fig. 1. Bumelia oklahomensis, new species. 



2. Gymnocladus casei, new species. 



3. Platanus aceroides Goeppert. 



Plate 95. 



Figs. 1, 2. Sapinus oklahomensis, new species. 



3. Diospyros brachysepiala Al. Braun. 



4. Rliamnus lesquereuxi, new species. 



5. Platanus aceroides Goeppert. 



1 Berry, E. W., U. S. Geol. Survey Prof. Paper 91, 1916, p. 333. 



