188 DESCRIPTION OF SPECIES. 



Ilex knightiaefolia, sp. nov. 



Plate XL, Figs. 4, 5. 



Leaves membranaceous, linear in outline, decurrent to the petiole, rounded and 

 acuminate at the apex, deeply dentate; secondary nerves at right angles, curving 

 abruptly and anastomosing at right angles at a distance from the borders, joined to 

 the teeth by nervilles ; teeth large, irregular in distance, turned outside and sharply 

 pointed. 



These leaves have pecuHar characters which seem to refer them to 

 some types of the Proteacece of New Holland, Banksia Hugelii, R. Br., and 

 spe-cies of Kniglitia. The small leaf, fig. 5, is better preserved but not 

 sufficiently so to show the base of the leaf which, being lacerated, appears 

 to follow and border the thick petiole to its point of attachment. The 

 teeth, like the secondary nerves, are at right angles to the midrib except 

 near the apex, which is formed of a sharply angular point ; the secondary 

 nerves are separated by slightly thinner and shorter tertiary ones, anas- 

 tomosing with nervilles at right angles in traversing the areas and united 

 to the up.per part by curves or strong nervilles also at right angles. 



iTtt^-.— Florissant. U. S. Geol. Expl. Dr. F. V. Hayden. 



RHAMNE^. 



" U. S. Geol. Rep.," vii, p. 272. 



PALIURUS, Tourn. 



Paliunis Florissanti, Lesqx. 



Hid., p. 274, pi. 1, fig. 18. 



Paliurus orbiculatus, Sap. 



Plate XXXVIII, Fig. 12. 

 Saporta, "Et.," iii, 2, p. 182, pi. vii, fig. G. 



Leaves small, membranaceous, orbicular, very entire, triple-nerved from the base; 

 lateral nerves curved upward in ascending to near the apex, where they unite to the 

 secondary nerves which are distant and few. 



Though the nervation is not as distinct as in the leaf published by 

 Saporta, the affinity is so clear that it is not possible to doubt specific 

 identity; the basilar nerves, equally branching, ascend high, joining the 

 few secondary nerves, one of which only is distinct in the specimen of 

 Florissant and two only on that figured by Saporta, who described the 



