Ficus. URTICINEA.. 17 
-same,—for in both leaves the midrib is comparatively thin, —it appears 
referable rather to this than to the former species, to which its affinity 
is also marked. This type is Miocene, the species being very closely 
related to Udmus tenunervis, Lesqx., of South Park, which itself is allied 
to U. Braun, Heer, of the Upper Miocene of Ciningen. 
Habitat. — Table Mountain, Tuolumne County, California. Voy’s Collection. 
FICUS, Tourner. 
Ficus sordida, sp. nov. 
PLAV. Bigs. 6, 5. 
Leaves large, coriaceous, entire, broadly ovate or nearly round, obtuse or pointed, truncate 
or slightly cordate at the nearly equilateral base, palmately five nerved from the top 
of an enlarged thick petiole ; nervation coarse, camptodrome. 
Of the two leaves which represent this fine species, one, nearly round, 
is twelve centimeters broad, ten and a half centimeters long, slightly 
contracted toward the very obtuse point. The other, thirteen and a half 
centimeters long, is more enlarged toward the subcordate base, where 
it measures eleven and a half centimeters, rapidly narrowing upwards to 
an acute point. The lateral nerves curve in passing to the borders, the 
inner pair ascending to near the top, there parallel with the secondary 
nerves, three pairs of them, the lower one at a greater distance from the 
base, and thinner than the middle. The surface of these leaves is black, 
somewhat crumpled or rather smooth, but deeply cut by the nervation, 
and irregularly wrinkled. The nervilles, in right angle to the veins, 
obliquely divide in anastomosing, and by subdivisions constitute an irreg- 
ularly comparatively large polygonal areolation. 
This species, though of the same type as the following, is evidently 
different from it. It is comparable, even apparently closely allied, to the 
fragment of leaf described by Heer as Ficus ? granlandica, Flor. Arct., II. 
p- 472, Pl. LIV. Fig. 2. Another fragment, less complete, is figured in 
the same work, I. Pl. XIII. Fig. 6. The nervation is about of the same 
character. In the Greenland leaves, however, the primary veins are 
more slender, the leaves smaller, and the areolation more compact. 
Habitat. — Chalk Bluffs, Nevada County, California. Voy’s Collection, 
