106 DESCRIPTION OF SPECIES. 



This definition merely relates to the peculiar leaves described below, 

 whose relationship is marked only with leaves of some species of Lomatia. 

 Their texture is thick. The surface is always covered by a coaly layer, 

 obliterating the nervation. 



Lomatia hakeaefolia, sp. nov. 

 Plate XXXII, Fig. 19. 

 Leaf obliquely truncate at base, lanceolate, acuminate, irregularly deeply dentate. 

 This form differs from the following by the segments, or lobes, being 

 shorter and directed to the outside at right angles to the primary nerve; 

 these acute short lobes or teeth, four on each side, are opposite and sepa- 

 rated by broad shallow sinuses; no trace of secondary nerves is discernible. 

 Hab.— Florissant; rare. U. S. Geol. Expl. Dr. F. V. Hayden. 



Lomatia spinosa, sp. nov. 



Plate XLIII, Fig. 1. 



Leaves narrowly lanceolate, long-acuminate, broadly alternately acutely dentate- 

 lobed; divisions gradually shorter upward, the terminal long-acuminate. 



Related to the preceding species but differing by the lacinia? being 



longer, turned upward, decurrent. The primary nerve is scarcely visible. 



Hob.— Florissant; rare. U. S. Geol. Expl. Dr. F. V. Hayden. 



Lomatia terminalis, sp. nov. 

 Plate XLIII, Figs. 2-7. 



Leaves linear-lanceolate, acuminate, deeply lobate; lobes oblique, lanceolate, 

 acute, decurrent aloug the primary thin nerve; lateral nerves generally distinct. 



Hab. — With the preceding; not rare. U. S. Geol. Expl. Dr. F. V. 

 Hayden. 



Lomatia tripartita, sp. nov. 

 Plate XLIII, Figs. 8-10. 



Leaves palmately trilobate, narrowly cuueate to the base; lobes obliquely diverg- 

 ing, oblong, obtuse or obtusely pointed, entire or dentate-lobed on one side; primary 

 nerves more or less distinct. 



The three fragments representing this species may be mere forms of 

 the preceding. 



Hab. — Florissant; rare. U. S. Geol. Expl. Dr. F. V. Hayden. 



