PERIOD. 165 
THE CARBONIFEROUS 
lhe simply herbaceous ferns 
r 
are extremely numerous, and belong to such widely-distributed 
which date from the Devonian. 
Europe and 
cks, 
Carboniferous Ro 
North America. 
es canne@fornits. 
Fig. 109.—Ca/amnztt. 
and largely-represented genera as JVeuropteris, Odontopteris (fig. 
The fossils known as Ca/amites (fig. 109) are very common 
108), Alethopteris, Pecopteris, Sphenopteris, Hymenophyllites, &c. 
