116 THE MEDALS OF OREATION. Cuap. VI 
* 
tomous, sometimes reti- 
culated, or anastomosing 
at their base. The plants 
of this genus resemble 
the ferns with simple 
leaves. A few species 
only are known; of 
these, two are from the 
coal-shale, one from the 
lias, and one from the 
oolite. 
ODONTOPTERIS ( tooth- 
Lien. 23. GLOSSOPTERIS PHILLIPSII; nat. z 
Oolite, Scarborough. leaf ). Lig n. 24.—Leat 
not contracted ; the veins equal, simple, dichotomous, aris- 
ing side by side from the base of the leaflet ; no distinct — 
Lien, 24. ODONTOPTERIS SCHLOTHEIMII; nat. 
Coal-shale of Saxony. 
midrib. In their general aspect these plants resemble some 
South American species of Osmunda. Five species only are 
known, all of which belong to the most ancient coal strata. 
AnomoptEris (anomalous fern—so named because the 
plants differ from all recent and fossil ferns). Lign. 25.— 
Leaves deeply pinnated ; leaflets very long, entire, linear, 
bipinnate, the leaflets ad- 
hering to the rachis or stalk by their whole base, which is — 
