54 
BRITISH EOCENE FLORA. 
to that genus, especially as it seems to differ but slightly from Pteris pennaformis, Heer, 
P. pseiidopennaformis, Lesquereux, and other Eocene Ferns. 
The specimens figured by Heer in the 'Flora Tert. Helvetica,' vol. i,"as P. ParscJdu- 
ffiana, P. pemi(sformis, and P. Gaudini, belong, with perhaps one exception, to a single 
species. He only separates them on account of the occasionally twice-forking veins and 
the slightly-toothed margin of the latter. Both characters, however, are seen to be shared 
by P. pennceformis, the first in pi. xii, fig. 1 c, and the second in fig, 1 h. P. Gaudini 
is also identical, and the species is described merely on a rather smaller pinna. Fig. 2 a 
seems to be an entirely different form. 
Pteris (?) HooKERi, Heer (sp). 
Pecoptekis Hookekt, Heer. Lignites of Bovey Tracey, 
p. 33, pi. vii, fig. 3, 1863. 
P.pinnis elongato-lanceolatis, tenue-serratis ; nervatione Ale- 
tliopteridis genuince, nervo primario tenui, nervis secundariis angulo 
acutissimo orientibus^ ramis elongatis- 
Middle Bagshot, Bovey Tracey. 
The drawing reproduced is from the original study by Mr. 
Fitch, which is not, as stated by Heer, of the natural size, but 
enlarged two or three times. The specimen itself was lost before 
Heer described it, but Mr. Fitch's experience and reputation in 
delineating Ferns is so great that the accuracy of his drawing 
cannot be questioned. It slightly resembles portions of the Pteris 
Eocenica of Bournemouth and approaches, both in its venation 
and serration, the apices of pinnules of a number of existing 
species of Pteris, as well as of other Ferns. 
(i) Marattiacea. 
Marattia HooKERi, JEtt. and Gard. Plate XII, figs. 1 — 
M. fronde quadri- {?) pinnatijida, suhmembranacea, rJiacJiide anguste alafa, segmentis 
oblique oblongis parce dentatis ; nervatione Craspedopteridis, nervo primario e rhachide 
angido acuto oriente, tenui, nervis secundariis paucis tenuissimis, vix disiinctis. 
71(1.26.— p. Hookeri. Traced 
from Mr. Fitch's drawing. 
