knowlton.] TERTIARY PLANTS OF NORTH AMERICA. 215 
Scleropteris elliptica Font. Potomac Fl., p. 151, pi. xxviii, f. 2, 4, 6; 
xxix, f. 1, 1889. 
Potomac formation: Fredericksburg, near Potomac Run, near 
Dutch Gap Canal, Kankeys, and near Telegraph Station, Virginia. 
Scleropteris elliptica longifolia Font. Potomac Fl., p. 152, pi. xxviii, 
f. 7, 1889. 
Potomac formation : Fredericksburg, Virginia. 
Scleropteris vernonensis Ward. Fifteenth Ann. Eept. U. S. Geol. 
Surv., p. 349, pi. ii, f. 1-3, 1895. 
Potomac formation : Mount Vernon, Virginia. 
Scleropteris virginica Font. Potomac Fl., p. 152, pi. xxviii, f. 3, 5, 
1889. 
Potomac formation: Dutch Gap Canal, Virginia. 
SELAGINELLA Beauvois. Prodr. iEtheog., p. 101, 1805. 
Selaginella Berthoudi Lx. Ann. Eept. U. S. Geol. and Geogr. Surv. 
Terr., p. 395, 1873 [1874J ; Tert. Fl., p. 46, pi. v, f. 12, 12a, 1878. 
Denver group: Golden, Colorado. 
Selaginella falcata (Lx.) Emend. Kn. 
Selaginella ? falcata Lx. Bull. U. S. Geol. and Geogr. Surv. Terr., vol. i, p. 365, 
1875 [1876] ; Ann. Kept. U. S. Geol. and Geogr. Surv. Terr., p. 297, 1874 
[1876; Tert. Fl., p. 46, pi. lxi, f. 12-15 [non pi. lxiv, f. 13, 13a], 1878. 
Montana formation: Point of Rocks, Wyoming. 
Selaginella falcata Lx. Ex. p. [Tert. Fl., pi. lxiv, f. 13, 13a] = Lycopo- 
dium Lesquereuxii. 
Selaginella laciniata Lx. Bull. U. S. Geol. and Geogr. Surv. Terr., 
vol. i, p. 378, 1875 [1876]; Ann. Kept. U. S. Geol. and Geogr. Surv. 
Terr., p. 297, 1874 [1876]; Ter. Fl., p. 47, pi. lxiv, f. 12, 12a, 1878. 
Montana formation: Point of Rocks, Wyoming. 
SCLEROTITES Meschinelli. Syllog. Fung. Foss., p. 67 [803], 1892. 
Sclerotites rubellus (Lx.) Meschinelli. Syllog. Fung. Foss., p. 69 
[805], 1892. 
Sclerotium rubellum Lx. Ann. Rept. U. S. Geol. and Geogr. Surv. Terr., p. 
375, 1872 [1873] ; Tert. FL, p. 35, pi. i, f. 2, 2/, 1878. 
Denver group: Golden, Colorado. 
Sclerotites sp. (Lx.) n. comb. 
Sclerotinm sp., Lx. Fl. Dak. Gr., p. 23, pi. lix, f. 4, 4a, 1891. 
Dakota group. 
Sclerotium rubellum Lx. = Sclerotites rubellus. 
Sclerotium sp. Lx.= Sclerotites. 
SEQUOIA Endlicher. Synop. Conif., p. 197, 1847. 
Sequoia acuminata Lx. Bull. U. S. Geol. and Geogr. Surv. Terr., 
vol. i, p. 384, 1875 [1876] ; Tert. Fl., p. 80, pi. vii, f. 15-1 6a, 1878. 
Laramie group: Black Buttes, Wyoming. 
Sequoia acutifolia Nevvby. Am. Jouru. Sci., vol. xli, p. 200, pi. xiv, 
f. 7, 7a, 1891. 
Kootanie: Great Falls, Montana. 
