92 CATALOGUE OF THE CRETACEOUS AND [bull 152. 
Dryopteris elliptica (Font.) n. comb. 
Aspidium ellipticum Font. Potomac FL, p. 95, pi. xiii, f. 9, 10, 1889. 
Potomac formation: Near Potomac Run, near Brooke, Virginia. 
Dryopteris fredericksburgense (Font.) n. comb. 
Aspidium fredericksburgense Font. Potomac Fl., p. 94, pi. xi, f. 1-6; xii, f. 
1-6 ; xvi, f. 9 ; xix, f. 6, 7, 1889. 
Potomac formation: Fredericksburg and near Telegraph Station, 
Virginia. 
Kootanie: Anthracite, British Columbia; Great Falls, Montana. 
Dryopteris heterophylla (Font.) n. comb. 
Aspidium heterophylla Font. Potomac Fl., p. 96, pi. xiv, f. 1-5; xv, f. 1-5, 
1889. 
Potomac formation : Fredericksburg, Virginia. 
Knoxville beds : Tehama County, California. 
Dryopteris idahoensis Kn. Eighteenth Ann. Kept. U. S. Geol. Surv., 
pt. iii, p. 721, pi. xcix, f. 1, 2, 1898. 
Payette formation: Marsh, Idaho. 
Dryopteris Kennerleyi (Newby.) n. comb. 
Aspidium Kennerleyi Newby. Bost. Journ. Nat. Hist., vol. vii, p. 513, 1863. 
Upper Cretaceous: Vancouver Island (Dn.). 
Upper Cretaceous!: Newcastle coal, Vancouver Island. 
Dryopteris macrocarpa (Font.) n. comb. 
Aspidium macrocarpum Font. Potomac FL, p. 103, pi. xvii, f. 2, 1889. 
Potomac formation : Dutch Gap Canal, Virginia. 
Dryopteris microcarpa (Font.) n. comb. 
Aspidium microcarpum Font. Potomac FL, p. 103, pi. lix, f. 2, 12 ; lx, f. 6, 7, 
1889. 
Potomac formation: Near Potomac Bun, Virginia. 
Dryopteris monocarpa (Font.) n. comb. 
Aspidium monocarpum Font. Proc. U. S. Nat. Mus., vol. xv, p. 490, pi. lxxxiii, 
f. 4-6a; pi. lxxxiv, f. 3, 3a, 1892. 
Kootanie : Great Falls, Montana. 
Dryopteris montanese (Font.) n. comb. 
Aspidium montanense Font. Proc. U. S. Nat. Mus., vol. xv, p. 490, pi. lxxxii, 
f. 1-3 ; pi. lxxxiii, f. 2-3a, 1892. 
Kootanie: Great Falls, Montana. 
Dryopteris oblongifolia (Font.) n. comb. 
Aspidium oblongifolium Font. Potomac FL, p. 100, pi. xxi, f. 5, 1889. 
Potomac formation: Near Potomac Bun, Virginia. 
Dryopteris Oerstedi? (Heer) n. comb. 
Aspidium Oerstedi? Heer. Fl. Foss. Arct., vol. vi, abt. li, p. 30, pi. xxxiv, 
f. 3, 4, 1882 ; Font., Potomac FL, p. 99, pi. xix, f. 4, 1889. 
Potomac formation: Near Telegraph Station, Virginia. 
Dryopteris parvifolia (Font.) n. comb. 
Aspidium parvifolium Font. Potomac FL, p. 100, pi. xxi, f. 6 ; xxiv, f. 8 ; xxv, 
f. 10; xxvi, f. 1, 14, 16, 17, 1889. 
Potomac formation : Fredericksburg, Dutch Gap Canal, Virginia. 
Dryopteris pinnatifida (Font.) n. comb. 
Apsidium pinnatifidum Font. Potomac FL, p. 101, pi. xxi, f. 15, 1889. 
Potomac formation : Bank near Brooke, Virginia. 
