[PENHALLOW] NOTES ON FOSSIL WOODS FROM TEXAS 105 
western and continental an area as Texas, would point to the fact that 
it, together with Laurus, was formerly a continental type which was 
gradually pushed southward, probably at the time of the greatest 
southern extension of the continental glacier, and that they have thereby 
become insular types, having been unable to regain their hold upon 
the mainland, although they do maintain a precarious existence in 
Florida, where they are wholly confined to the southern shores (15), as 
represented in Reynosia latifolia and the genus Laurus. 
CONCLUSIONS. 
The conclusions which appear to be justified by the foregoing facts 
are :— 
1.—During Hocene time there was a generic continuity in the floras of 
southern Canada and the southern United States, but distinct 
species characterized the northern and southern portions. 
2.—The southern portion of this flora embraced species which have since 
become extinct and now belong to genera which are almost wholly 
insular, but which retain an uncertain position in the most 
southern extension of the continental area. 
3.—Although both Sequoia and Cupressoxylon may have been repre- 
sented in the Eocene of Texas, it is reasonable to suppose that 
both 8. langsdorfii and C. dawsoni were northern types, the 
remains of which were carried southward through the action of 
rivers and there mingled with the remains of trees belonging to 
the local flora. 
LITERATURE. 
Dawson, G. M. (1).—Report of the Geology and Resources of the 49th 
Parallel, from the Lake of the Woods to the Rocky Mountains. 
Brit. N. A. Bound. Comm., 1875, pp. 93-101. 
Dumste, E. T. (2).—Report on the Brown Coal and Lignite Deposits 
of Texas. Geol. Surv., Texas, 1892, pp. 149-154. 
(3) The Cenozoic Deposits of Texas. Journal of Geology, 
1894, II, pp. 552-553. 
Feuix, J. (4).—Zeitschr. d. Deutsch Geol. Gesell., 1896, p. 252. 
Harris, GILBERT D. (5).—New and otherwise interesting Tertiary 
Mollusca from Texas. Proc. Phil. Acad. Nat. Sc., 1895, pp. 
45-88. 
Hinearp, E. W. (6).—Report on the Geology and Agriculture of the 
State of Mississippi. Jackson, 1860, pp. 123-128. 
