208 
Alabama and the Cheyenne sandstone of south- 
ern Kansas. I have recently received a fine 
specimen from northeastern New Mexico from 
a sandstone that appears to represent the Pur- 
gatoire formation. 
The specimens from the Cheyenne sandstone, 
all of which are fragmentary, were found in 
brown clay in a draw on Medicine Lodge Creek, 
3 miles. above Belvidere (collected by Ward and 
Vaughan, 1896, no number); 14 miles north- 
west of Belvidere (2218); near Medicine Lodge 
Creek, 2 miles west of Belvidere (2224, same 
locality as that first cited); and 24 miles due 
west of Belvidere (2226). 
Order GLEICHENIALES. 
Family GLEICHENIACEAE. 
Genus GLEICHENIA Smith. 
Gleichenia nordenskiéldi Heer.” 
Plate XLVII, figure 1. 
Gleichenia nordenskiéldi Heer, Flora fossilis arctica, vol. 3, 
Abt. 2, p. 50, pl. 9, figs. 6-12, 1874; vol. 6, Abt. 2, 
p- 8, pl. 1, figs. 1, la, 1882. 
Lesquereux, U. 8. Geol. and Geog. Survey Terr. Ann. 
Rept. for 1874, p. 334, pl. 2, fig. 5, 1876; Cretaceous 
and Tertiary ‘floras, p. 26, pl. 1, figs. 1, la, 1883; 
U.S. Geol. Survey Mon. 17, p. 25, 1892. 
This species was -described originally by 
Heer from material collected in the Kome beds 
of western Greenland. Species of Gleichenia 
‘are very abundant throughout the Cretaceous 
section of that region, and Heer founded very 
many species on this material, more than seem 
warranted. The stratigraphic boundary be- 
tween the Kome and Atane beds has been 
shown by subsequent workers to be very 
indefinite, and the Atane beds are present 
at the Kome locality, a fact which may account | 
for the range accredited to a large number 
of the species. ; 
Lesquereux subsequently identified Glei- 
chenia nordenskidldi from the Dakota sand- 
stone at Fort Harker, Kans. His material 
was not very convincing and perhaps should 
not have received a specific name. Material 
2 The following do not belong to this species: 
Gleichenia nordenskidldi Fontaine, U. S. Geol. Survey Mon. 15, p. 119, 
pl. 21, fig. 11, 1890. 
Gleichenia nordenskiéldi Fontaine, in Ward,U. S. Geol. Survey Mon. 48, p. 
231, pl. 65, figs. 24-29, 1906. ; z 
Pezopterts strictinervis Fontaine. Fontaine, in Diller and Stanton, Geol. 
Soc. America Bull., vol. 5, p. 450, 1895; in Stanton, U. S. Geol. 
Survey Bull. 133, 1895, p. 15, [1896]. 
Aspidium heterophyllum Fontaine. Fontaine, in Diller and Stanton, 
op. cit., p. 450; in Stanton, op. cit., p. 15. 
OQsmunda dicksonioides Fontaine. Fontaine, in Diller and Stanton, op. 
cit., p. 450; in Stanton, op. cit., p. 15. 
SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1921. 
identical with that of Lesquereux is not un- 
common in the Cheyenne sandstone, and I 
have used the same name for it, although it 
should be borne in mind that neither Les- 
quereux’s material nor mine is‘ distinct from 
what has commonly been called Gleichenia zip- 
pet Heer,?* which has been identified, often 
wrongly, I believe, at-a large number of localities 
and horizons. 
The unwarranted determination of uniden- 
tifiable scraps by Ward and especially by 
Fontaine has almost completely obscured the 
stratigraphic value of any material that they. 
described. The specimen from Dutch Gap, 
Va., which Fontaine referred to this species 
not only differs from the type material but 
might readily represent the terminal portion 
of half a dozen different Patuxent species of 
ferns. Similarly the specimens from the Knox- 
ville formation which Fontaine referred to 
Gleichenia nordenskidldi are not only not that 
species but they are not even all the same thing, 
and the fact that these identical fragments 
were also referred by Fontaine to Pecopteris, 
Aspidium, and Osmunda, as well as to Gleiche- 
nia, is a fitting commentary on both the char- , 
‘acter of the material and the critical value of 
Fontaine’s results. 
What I have called Gleichenia nordenskisldi 
is found in the Cheyenne sandstone in clay 2} 
miles due west of Belvidere (2226), also de- 
scribed as a draw on Medicine Lodge Creek, 3 
miles above Belvidere (fern bed, no number), 
collected. by Ward and Vaughan in 1896. 
Gleichenia? bohemica (Corda) Berry. 
Plate XLVII, figure 2. 
Pecopteris bohemica Corda, in Reuss, Versteinerungen der. 
béhmischen Kreideformation, p. 95, pl. 49, fig. 1, 
1846. 
_ Heer, Flora fossilis arctica, vol. 3, Abt. 2, p. 96, pl. 26, 
fig. 17a, 1874; vol. 7, p. 6, pl. 58, fig. 4, 1883. 
Engelhardt, Naturf. Gesell. Isis in Dresden Abh., 
1891, No. 7, p. 86. 
Kryshtofovich, Coll. Sci. Imp. Univ. Tokyo Jour., vol. 
40, art. 8, p. 31, fig. 2, 1918. 
This species was described by Corda in 1846 
from material obtained in the Cenomanian of 
Bohemia. It was subsequently recorded from 
the same horizon in Saxony. Heer referred 
a number of Greenland specimens to it, and 
lately Kryshtofovich has recorded it from the 
Upper Cretaceous of Sakhalin Island. If these 
4 Heer, Oswald, Flora fossilis arctica, vol. 1, p. 79, pl. 43, fig. 4, 1868. 
