DESCRIPTIONS OF SPECIES. 113 



in the collections from Alaska made by Captain Howard, and sometimes 

 several on the same slab that exhibit no differences except the marked 

 variation in form shown in the figures and alluded to in the name given. 

 Compared with the living species, these leaves have much the aspect of 

 some of the forms of P. Virginiana, the marginal serration being very 

 much the same, though the leaves of the living plant are usually obovate. 



A species of Prunus is described by Professor Heer from the Tertiary 

 strata of Greenland under the name of P. Scottii (Fl. Foss. Arct., Vol. I, 

 p. 126, PI. VIII, fig. 7), but the only leaves he describes and figures are 

 much larger and longer and more coarsely toothed than these. 



Numerous species of Prunus have been described from the Tertiary 

 of the Old World, but so far as Ave can judge there are none that have the 

 somewhat peculiar lanceolate leaf, broader in the middle than elsewhere 

 and narrowed at both ends, terminating in a long point, like the one under 

 consideration. It has been thought necessary, therefore, to distinguish 

 this by a special specific name. 



Formation and locality: Tertiary (Miocene). Cook Inlet, Alaska. 



Order LEGUMINOS/E. 

 Cassia sp.? Newb. 



PI. XLVI, fig. 10. 



Note. The only information which I have been able to obtain in regard to 



this figure is the manuscript note, "Cassia fruit," by Dr. Newberry, on the margin 

 of the plate, and the locality given on the specimen label.— A. H. 



Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon. 



Leguminosites Marcouanus Heer. 

 PI. V, fig. 3. 



Proc. Acad. Nat. Sci. Phila. (1858), p. -265; Ills. Cret. and Tert. PI. (1878), PI. V, 

 fig. 3, under Pliyllites obcordatus. 



The original tracing of this leaf, on which Professor Heer has writ- 

 ten the name given it, enables me to identify it with certainty and to 

 correct an error which has been committed in reference to it, namely, that 

 mon xxxv 8 



