— 
an 
—- 
118 THE MEDALS OF CREATION. Cuar. VI. 
or bifurcated at their base, and almost perpendicular to the | 
median vein. These ferns are related to certain species 
’ 
== 
= > 
WS SS > 
T@NIOPTERIS LATIFOLIA; fragment of a frond; nat. 
Lien. 26. 
Stonesfield Slate. 
of Polypodium. Three species are known; two from the 
Oolite, and one from a tertiary deposit. The specimen 
figured is a fragment. 
Fig. 1.—PrEcoptERIS MuRRAYANA; a pinnule with the fructification ; 
magnified. Inf. Oolite, Scarborough. 
2.—PECOPTERIS LONCHITICA. Coal-shale, France. 
PECOPTERIS (embroidered fern). Lign. 27.—Leaves once, 
twice, or thrice pinnated ; leaflets adhering by their whole 
base to the rachis, rarely by the centre only ; traversed by 
Lien. 27. 
