4rt.19. MIOCENE PLANTS FROM SOUTHERN MEXICO—BERRY. in’ 
The genus Simaruba in the existing flora contains a limited number 
of species of arborescent forms, confined to the Americas, where they 
range from southern Florida through the Antilles to Brazil, and 
extend northward from South America in the tierra caliente of Central 
America. Fossil species have seldom been recognized, but these 
include a species in the lower Eocene of southeastern North 
America*™, a second and very conclusively identified form in the 
Miocene of Venezuela,” and a third in the Miocene of the Island 
of Haiti.” 
Occurrence.—1}4 km. west of the telegraph station, San Jose del 
Carmen, State of Vera Cruz. 
Holotype.—Cat. No. 36828, U.S.N.M. 
Order RHAMNALES. 
Family RHAMNACEAE. 
Genus GOUANIA Linnaeus. 
GOUANIA MIOCENICA, new species. 
Plate 7, fig. 4. 
Leaves of medium size, widest medianly, elliptical-ovate in general 
outline. Apex bluntly pointed. Base broadly rounded, the margins 
forming a wide, scarcely perceptible angle where they join the top 
of the petiole. Leaf substance thin. Margins entire for a greater 
or less distance above the base, becoming gradually and increasingly 
undulate distad, until in the upper half of the leaf they are coarsely 
and regularly crenate-undulate. Length about 6 cm. Maximum 
width about 4.25 cm. Petiole missing, presumably short. Midrib 
thin, but prominent. Secondaries six subopposite to alternate pairs, 
they are thin but prominent and diverge from the midrib at angles 
ranging from about 55° in the basal pair to 25° in the distal pair; 
all curve regularly upward subparallel with one another and with 
the lower lateral margins of the leaf; they ascend in sweeping curves 
which brings the distal ends of the proximal pair well above the 
middle of the leaf, and are ultimately camptodrome. The basal 
secondaries give off on their outer sides four or five sweepingly curved 
camptodrome tertiaries. The second pair of secondaries also fre- 
quently give off laterally one or two similar but smaller camptodrome 
tertiaries. The enclosed tertiaries are thin, closely spaced, well 
marked, percurrent nervilles such as commonly characterize the 
leaves of this family. 
2% Berry, E. W., U.S. Geol. Survey Prof. Paper 91, p. 252, pl. 54, fig. 7, 1916. 
% Berry, KE. W., Proc. U.S. Nat. Mus., vol. 59, p. 573, pl. 109, fig. 2, 1921. 
% Berry, E. W., Idem, vol. 62, art. 14, p. 6, pl. 1, fig. 8, 1922. 
