200 UNITED STATES GEOLOGICAL SURVEY— TERTIAKY FLORA. 



ing thinner or nearly effaced, as in fig. 4. All the divisions are camptodromc, 

 the lateral nerves passing at an angle of 40 to 50°, nearly straight toward the 

 borders, where they abruplly curve, anastomosing in simple bows; the ner- 

 villes, oblique to the secondary veins, are strong, either simple or more rarely 

 divided in the middle; the details of areolation are obsolete. Though the 

 surface of tliese leaves is cut by the deeply impressed nervation, it is smooth, 

 nearly polished. 



Habitat. — Golden, Colorado. 



Ficus! Smithsonian a, Lesqz. 

 Plate XXXII, Fig. 5. 



Juglans Smilhsoniana, Lesqx., Supplement to Aunual Report, 1871, p. IG. 



Leaf coriaceous, smooth, lanceolate, gradually taiieriug upward from above the base, and acumi- 

 nate; borders entire and undulate ; middle nerve flat and broad ; lower pair of lateral veins more oblique 

 and ascending higher ; nervation camptodrome. 



This tine leaf, rounded and narrowed to the base, has slightly unequal 

 borders, the secondary veins irregular in distance, and nervilles in right angle 

 to the midrib and oblique to the lateral nerves. Of its characters, none is 

 clear enough for a definition of its generic relation. It has a degree of like- 

 ness by its form to Ficus Falconrri, Heer (Foss. Fl. of Bovey Tracy, Phil. 

 Trans., 1862, p. 1060), especially like fig. 7 of pi. l.xiv. The leaves of the 

 English species are, however, more narrowly attenuated to the base. I con- 

 sidered it at first as a Jughins, but the coriaceous leaves are against this 

 reference. Count Saporta supposes that it may represent an Arcdla. 



Habitat. — Raton Mountains, New Mexico {Dr. F. V. Hayden). 



§ II. — Palmately -nerved leaves. 

 Ficns occidentalis, Lesqx. 

 Plate XXXII, Fig. 4. 

 Dovibeyopsia occidentaUs, Lesqx., Annual Report, 1872, p. 380. — Scbp., Pal. V6g6t., iii, p. 607. 



Leaves comparatively thick, coriaceous, truncato-cordate at the base, narrowed upward into an 

 obtuse acumen, palmately triple-nerved; lateral veins equidistant, parallel, camptodrome. 



A number of finely preserved specimens of this species have been 

 obtained from the same locality, all, however, deprived of the petiole. Their 

 characters, form and nervation, as well as the coarse surface of the leaves, 

 deeply furrowed by the nerves, relate them to the following species. The 

 leaves are all of the same large size, twelve centimeters long or more, about 



