No. 3. — Specimens of Fossil Plants collected at Golden, Colorado, 
1883, for the Museum of Comparative Zodlogy at Cambridge, 
Mass., examined and determined by Leo LESQUEREUX. 
[Returned to the Museum, July 17, 1884.*) 
CRYPTOGAMOUS PLANTS. 
Lycopodiaceez. 
1. Selaginella Berthoudi, Lx. 2 specimens. 
Filicacee. 
. Sphenopteris Lakesii, Lx. 62 specimens. 
Sphenopteris membranacea, Lx. 2 specimens. 
Hymenophyllites confusus, Lx. 5 specimens. 
. Pteris pseudopenneformis, Lx. 2 specimens. 
. Pteris subsimplex, Lx. 20 specimens. 
Pteris erosa, Lx. 1 specimen. 
8. Pteris undulata, sp.nov. Leaves large, linear-lanceolate, regularly deeply 
undulate-crenate especially in the upper part; secondaries thin, distant, de- 
clined in joining the rachis, open in passing toward the borders; forking once 
at base, sometimes once again near the borders, very distinct. 
Much like P. subsimplex, Lx., U. S. Geol. Surv. of the Terr., VII. p. 52, PI. 
TV. fig. 5; but with the secondaries thinner and the borders undulate. The 
leaves, about 12 cm. long, 35 cm. broad, are coriaceous with polished surface. 
The angle of divergence of the veins is more acute, 45° to 50°, and their dis- 
tance 14mm. 2 specimens. 
9. Woodwardia latiloba, Lx. 53 specimens. 
10. Gymnogramma Haydenii, Lx. 8 specimens. 
TD OB ow bo 
Equisetaceeze. 
’ 11. Physagenia, species. Tubercles attached to filaments diverging in rows 
from a central point, composing the rhizoma of some Equisetacee, Central 
point exactly round, 2 mm. in diameter; tubercles oval, 12 mm. long, 6 mm. 
broad in the middle, strangled to 2 mm. at the point of union, and forming a 
chain of which two of the tubercles are seen in close connection. They are 
* The manuscript of this memoir, as it was delivered in 1884, is copied without 
any correction. — Ep1Tor. 
VOL. XVI. — NO. 3. 
