54 



BRITISH EOCENE FLORA. 



to that genus, especially as it seems to differ but slightly from Pteris penncBformis, Heer, 

 P. pseudopennceformis, Lesquereux, and other Eocene Ferns. 



The specimens figured by Heer in the ' Flora Tert. Helvetica,' vol. i, as P. ParscUu- 

 ffiana, P. pennaformis, and P. Gaudhii, 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 difierent form. 



'Siv..2h.—P.Hookeri. Traced 

 from Mr. Fitch's drawing. 



Pteris (?) Hookeri, Heer (sp). 



Pecopteris Hookeri, Heer. Lignites of Bovey Tracey, 

 p. 33, pi. vii, fig. 3, 1863. 



P.pmnis elongato-lanceolatis, tenue-serratis ; nervatione Ale- 

 tlwpteridis genuince, nervo primario tenui,nervis secundariis angula 

 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) Marattiacece. 



Marattia Hookeri, Ett. and Gard. Plate XII, figs. 1 — 7. 



M.fronde quadri- {?) pinnatifda, siihmembranacea, rhachide anguste alafa, segmentis 

 oblique oblongis parce dentatis ; nervatione Craspedopteridis, nervo primario e rhachide 

 angulo acuto oriente, tenui, nervis secundariis paucis fetiuissimis, vice distinctis. 



