ARCHEAN AND PALEOZOIC LIFE 417 
age of fishes, not with the idea of asserting that those 
were the only animals, but merely that the most notice- 
able creatures were true fishes. 
not like the food fishes of 
to-day, which are so well 
known in our streams, lakes, 
and oceans, but rather mail- 
clad forms (Fig. 259), and 
species like the sharks. 
While the record of vegeta- 
tion in this period is not nearly 
so marked as in the Carbonif- 
erous, there is little reason 
for believing that the Devo- 
nian plant-life wassparse. In 
many places, where favorable 
conditions for the preserva- 
tion of plant remains were 
present, we have extensive 
accumulations of these fossils. 
The plants of this time were 
They were, however, 
pe 
Le : 3 eras 
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: Te Toe Sesieterss 
OO Ge oe EE = <6 is 
~e ‘ * — 
3 rh ~n 4d Ca Ge 
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IT 
orEEL the Soerer tees To 
covet ieg 
BS 
© 3 
re : 
R} te) =) 
89. ’ 
ne pels 
S > 
°. * 
we Poh Oe 
ey y Fs - 
4" « te 
~ 
i 
* SY 
v4 ‘ 
4 a 
< ' 
; ‘A 
He 
Fic. 239. 
strange in aspect, and not like A Devonian fish (Pterichthys milleri, 
those of the present. There 
after Zittel). 
were, for instance, no flowering plants, but the land 
was clothed with unique forests of ferns and other 
low types, developed to a great size. 
Insects, which had appeared in the preceding ages, 
25 
