6 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. 62. 
to be identical with it is also present in the Republic of Haiti. The 
latter material shows a leaf slightly narrower than the type, but 
otherwise identical with it in both form and venation. 
The genus Pisonia contains over a dozen fossil species ranging 
from the Upper Cretaceous through the Tertiary, in the Northern 
Hemisphere. In the United States there are three species in the 
Wilcox, one in the Claiborne and three in the Jackson Eocene, and an 
eighth in the Alum Bluff formation (Miocene). None of these are 
especially close to the present fossil. The existing species are 
numerous, chiefly tropical and in the Western Hemisphere. The 
genus is still present in the floras of both the Island Republics. 
Occurrence.—Artibonite group, Miocene (station 7543). (Cat. No. 
36610, U.S.N.M.) 
Order GERANIALES. 
Family SIMARUBACEAE. 
Genus SIMARUBA Aublet. 
SIMARUBA HAITENSIS, new species. 
Plate 1, fig. 8. 
Leaves pinnately compound, as suggested by their botanical rela- 
tions, and by the sessile or subsessile, inequilateral, faleate character 
of the material. Leaflets ovate or elliptical in outline, widest in the 
median region, narrowed distad, and either rounded or shortly 
pointed. Base widely rounded and apparently sessile. The scanty 
amount of material (3 specimens) all lacks tips, so that the character 
of the apex is uncertain—one specimen suggests that it was emar- 
ginate, and the more complete specimen figured suggests that it may 
have been short pointed, although there is room in this specimen 
for it to have been rounded or emarginate. Margins full and entire. 
Texture subcoriaceous. Length about 3.5 ecm. Maximum width 
about 1.75 em. Midrib relatively very stout and prominent, curved. 
Secondaries numerous, stout, diverging from the midrib at wide 
angles, and camptodrome in the marginal region. 
The genus Simaruba, which in the modern flora has a limited 
number of species confined to the equatorial region of the Western 
Hemisphere has a fossil species in the lower Eocene of the Mississippi 
embayment ® and a second in the Miocene of Venezuela.’ 
Occurrence.—Artibonite group, Miocene (station 7544). A not 
certainly determined fragment from station 7542 appears to represent 
this species. 
Holotype. —Cat. No. 36611, U.S.N.M. 
epttiy: E. W. LU. s. Geol. paeey Prof. Paper 91, p. 252, pl. 54, fig.7 , 1916. 
Berry, E. W., Proc. U.S. Nat. Mus., vol. 59, p. 573, pl. 109, fig. 2, 1921, 
