- X - 
40. Hobson, J. B. Nevada County. Tenth. Ann. Rept. of the State Mine- 
ralogist 1890. 
41. Hofmann, Hermann, Untersuchungen über fossile Hölzer, Zeitschr. 
für Naturwissensch. Halle 1884. Bd. 57 (3). 
42. Holmes, W. H. Fossil forests of the volcanic tertiary formations 
of the Yellowstone Park. U. S. geol. and geogr. Surv, of the 
Terr. Bull. vol. V. Wash. 1879. 
43. Iddings, J. Geology of the Yellowst.-Nat.-Park. Monogr. vol. XXXII 
pt. II. 
44. lyes, J. Report upon the Colorado River of the West explored in 
1857 and 1858. Wash. 1861. Pt. HI. Geol. Rept. by J. S. Newberry. 
45. Kaiser, P. a) Ulmoxylon. Ein Beitrag zur Kenntnis fossiler Laub- 
hölzer in Zeitschrift für die gesamten Naturwissenschaften. Halle 
1879. Bd. 52 (4) pp. 88 ff. 
b) Ficoxylon bohemicum. Ein neues Laubholz, in Zeitschrift 
für die gesamten Naturwissenschaften. Halle 1880. Bd. 53. (6). 
p. 309. 
46. King, Cl. in U. S. Geol. Explor. 40 th. parallel, 1878 vol. I. 
47. Knoblauch. Anatomie des Holzes der Laurineae in Flora 1888. 
48. Knowlton, F. H. a) New species of fossil wood from Arizona and 
New Mexiko. Proc. U. S. Nat. Mus. vol. XI. 1888. 
b) Report on fossil plants near Ellensburg, Wash. Bull. 108. 
c) A Catalogue of the cretaceous and tertiary plants of North 
Amerika. 
d) A review of the fossil flora of Alaska with descriptions of 
New species. Proc. vol. XVII. 1894. 
e) Fossil flora of Alaska. Bull. Geol. Soc. of Am. vol. V. 1894. 
f) Notes on the examination of a collection of interglacial wood 
from Muir Glacier, Alaska U. S. Jour. Geol. vol. III. 1895. 
g) Report on the Flora of Independence Hill. Journal of Geology 
vol. IV. 1896. 
h) Report on the fossil plants coUected in Alaska in 1895 as 
well as an enumeration of those previously known from the same 
region, with a table showing their relative distribution. U. S. 
Geol. Sur. XVIII. Ann. Rept. pt. I. 1896. 
i) Description of a supposed new species of fossil wood from 
Montana. Bull, of the Torrey Bot. Club, vol. 23, Nr. 6. June 1896. 
k) Report on a collection of fossil plants from the Yukon River. 
Alaska, U. S. Geol. Surv. 18th. Rept. pt. III. 1898. 
1) Fossil flora of the Yellowstone Nationalpark in Geology of 
the Yell. Nat.-Park. Chapter XIV. Monogr. vol. XXXII. pt. II. 
49. Koehnen, H. Deutsche Dendrologie. 
50. Kraus, Gr. a) Mikroskopische Untersuchungen über den Bau lebender 
u. vorweltlicher Nadelhölzer. Würzburger naturw. Zeitschrift, 
vol. V. 1864 pp. 144—200. 
