174 DESCRIPTION OF SPECIES. 



The leaf described here is the only one seen as yet of this genus in 

 the North American geological formations; thirty-four species have been 

 described from the European Tertiary. The leaves are generally very small 

 and have probably been unobserved until now. 



Hab. — Florissant. Princeton Museum, No. 874. 



SAPOTACE^E. 



BUMELIA, Swartz. 



The plants of this genus have the leaves alternate, petiolate, coria- 

 ceous, and very entire. They inhabit at the present epoch tropical and 

 boreal America. Ten fossil species are described from the European 

 Continent. 



Bumelia Florissanti, sp. nov. 



Plate XXXIV, Figs. 4, 5. 



Leaves thick, obovate, obtuse; lateral nerves thin, at an open angle of divergence, 

 parallel, camptodrome. 



The leaves, nearly 5 centimeters long and 3 broad in the upper part, 

 are rounded at the apex, either slightly emarginate or apiculate, gradually 

 narrowed to a very short petiole. Of the nervation nothing is distinct 

 except the thin secondary nerves diverging at base at an angle of 60° to 70°' 

 much curved in passing toward the borders, crossed at right angles by close 

 nervilles, camptodrome. In size and shape these leaves are comparable 

 to Bumelia subspathulata, Sap., "Et.," iii, 3, p. 62, pi. 10, figs. 18-22, and 

 in their different characters to the living B. retusa of Jamaica. 



Hab. — Florissant; not rare. U. S. Geol. Expl. Dr. F. V. Hay den. 



DIOSPYROS, Linn. 

 "U. S. Geol Rep.," vii, p. 230. 



Diospyros bracliysepala, Al. Br. 

 Plate XXXIV, Figs. 1, 2. 

 Ibid., p. 232, pi. xl. figs. 7-10; lxiii, fig. 6. 



The two leaves figured in this volume are more positively identified 

 with the European species than the fragments of "Rep.," vii, pi. xl, whose 

 affinity is still somewhat doubtful on account of the thickness of the 

 secondary nerves. 



Hob. — Florissant; not rare. Princeton Museum, Nos. 631, 657, &c. 



