knowlton] TERTIARY PLANTS OF NORTH AMERICA. 49 
Betula grandifolia Ett. Foss. Fl. v. Bilin: Denkschr. Wien. Akad., 
vol. xxvi, p. 123, pi. xiv, f. 23, 25, 1867; Heer., Fl. Foss. Alaska, p. 29, 
pi. v, f. 8, 1808. 
Eocene*?: Port Graham, Alaska. 
Betula heterodonta Newby. Proc. U. S. Nat. Mus., vol. v, p. 509, 1882 
[1883]. 
Miocene?: Bridge Creek, Oregon. 
Betula lutea? Mx. f. Penhallow, Trans. Roy. Soc. Canada, 2d ser., vol. 
ii, sec. iv, p. 66, 70, 1896. 
Pleistocene: Besserers Wharf, Ottawa River. 
Betula MacClintockii Cramer in Heer. Fl. Foss. Arct., vol. i, p. 171, 
pi. xxxiv, f. 4^, b; xxxix, f. 1-9, 1868. 
Tertiary: Banks Land. 
Betula nigra L. Knowlton, Am. Geol., vol. xviii, p. 371, 1896. 
Glacial: Morgantown, West Virginia. 
Betula parce-dentata Lx. Cret. and Tert. Fl., p. 242, pi. 1, f. 12, 1883. 
Miocene: John Day Valley, Oregon. 
Betula perantiqua Dn. Trans. Roy. Soc. Canada, vol. i, sec. iv, p. 27 ? 
pi. vii, f. 27, 1882 [1883]. 
Upper Cretaceous: Baynes Sound, Port McNeill. 
Betula prisca Ett, Foss. Fl. v. Wien., p. 11, pi. i, f. 15-17, 1851 ; Ward, 
Bull. TJ. S. Geol. Surv., no. 37, p. 31, pi. xiv, f. 2, 1887. 
Fort Union group : Seven-Mile Creek, Montana. 
Eocene!: Alaska. 
Betula Schimperi Lx. Bull. Mus. Comp. Zool., vol. xvi, p. 45, 1888. 
Denver group : Golden, Colorado. 
Betula Stevensonii Lx. Ann. Rept. U. S. Geol. and Geogr. Surv. 
Terr., p. 293, 1871 [1872] ; Tert. FL, p. 139, pi. xviii, f. 1-5, 1878. 
Betula Gopperti Lx. Tert. Fl., p. 138, pi. xvii, f. 21-23, 1878. 
Betula ! caudata ? Gnpp. Lx. Aun. Rept. op. cit., p. 293, 187 L [1872] . 
Laramie group?: Carbon and Evanston, Wyoming; British 
Columbia. 
Betula truncata Lx. Cret. and Tert. Fl., p. 150, pi. xxviii, f. 7, 8, 1883. 
Green River group : Florissant, Colorado. 
Betula Vogdesii Lx. Bull. U. S. Geol. and Geogr. Surv. Terr., vol. i, 
p. 386, 1875 [1870]; Ann. Rept. U. S. Geol. and Geogr. Surv. Terr., p. 
312, 1874 [1876] ; Tert. Fl., p. 137, pi. xvii, f. 18, 19, 1878. 
: Fort Fetterman. 
Betula sp., Dn. Trans. Roy. Soc. Canada, vol. v, sec. iv, p. 34, 1887. 
[Fossil wood.] 
Canadian upper Laramie: Souris River. 
Betula sp., Dn. Geol. Surv. Canada, Rept. of Progress for 1872-73, 
append, i, p. GS, 1873. 
Cretaceous : Vancouver Island, British Columbia. 
Betula sp., Dn. Trans. Roy. Soc. Canada, vol. i, sec. iv, p. 22, 1882 
[1883]. 
: Peace River, Northwest Territory. 
Bull. 152 4 
