41 
The complete synonymy and a full description are given in my report 
cited above and need not be repeated in the present connexion. In 
Alberta this species is unknown in the Kootenay but it is not uncommon 
in the Lower Blairmore, where it is represented by both sterile and fertile 
material. Elsewhere it is known from the Patuxent, Arundel, and Patapsco 
formations of the Potomac Group; from the Knoxville of California; and 
from the Lakota formation of eastern Wyoming. 
Occurrence. Localities CS1, DA3, DBX (common), and DF1. 
Cladophlebis distans Fontaine 
Cladophlebis distans Fontaine, U.S. Geol. Surv., Mon. 15, p. 77, PL 13, 
figs. 4, 5 (1890). 
Berry, Lower Cretaceous, p. 258, PL 32, figs. 5, 6 (1911). 
This species, which includes the Aspidium fredericksburgensis of 
Fontaine, is a common element in the Potomac Group of the Atlantic 
Coastal Plain, and it has also been recorded from the Kootenay and upper 
part of the Knoxville. Somewhat doubtfully determined fragments 
sparsely represented at locality CHS appear to represent this species in 
Alberta. 
Cladophlebis virginiensis Fontaine 
Cladophlebis virginiensis Fontaine, U.S. Geol. Surv., Mon. 15, p. 70, Pl. 3, 
figs. 3-8; Pl. 4, figs. 1, 3-6 (1890). 
Berry, Lower Cretaceous, p. 248, PL 29, figs. 4-6 (1911). 
Cladophlebis falcata Fontaine, U.S. Geol. Surv., Mon. 15, p. 72, Pl. 4, fig. 8; 
Pl. 5, figs. 1-6; PL 6, fig. 7; Pl. 7, figs. 1-2 (1890). 
Cladophlebis acuta Fontaine, Idem., p. 75, Pl. 5, fig. 7; Pl. 7, fig. 6; Pl. 10, 
figs. 6, 7; PL 11, figs. 7, 8; Pl. 166, fig. 5 (1890). 
Cladophlebis oblongifolia Fontaine, Idem., p. 74 (part), Pl. 7, figs. 3, 4 (1890). 
Cladophlebis wyomingensis Fontaine, in Ward, 19th Ann. Kept. U.S. Geol. 
Surv., pt. 2, p. 656; Pl. 160, figs. 16, 17 (1899). 
Cladophlebis falcata montanensis Fontaine, in Ward, U.S. Geol. Surv., Mon. 
48, p. 291, Pl. 71, figs. 14, 20 (1906). 
Cladophlebis acuta angustifolia Fontaine, Idem., p. 539, Pl. 114, fig. 5 (1906). 
In addition to the names cited in the above synonymy the following 
names of Fontaine also represent fragments of this species: Thinnfeldia 
variabilis, Asplenium distans , and Thinnfeldia montanensis . It may be 
described as follows: Frond large, bi- or tripinnate, but generally pre- 
served in a fragmentary condition. Rachis stout and rigid. Ultimate 
pinnae long, rather remote, alternate to sub-opposite. Pinnules ovate to 
lanceolate and sub-falcate in outline, sometimes obtusely pointed, mostly 
separate to the base, attached by their whole base, which may be more or 
less widened. Venation characteristic of the genus. Margins usually 
entire, sometimes slightly crenulate or sub-dentate but becoming entire 
distad. Texture coriaceous. The degree of separateness of the pinnules, 
as well as their relative length and breadth, and their more or less falcate 
form, are characters dependent upon the age of the frond or the position 
