
Parr Il. Secr. iii. (1.)§1.] OLD RED SANDSTONE. _709 
conifers (Dadoxylon, Ormoxylon,' &c.). From a locality on Lake 
Erie, Dr. Dawson describes a fragment of dicotyledonous wood, not 
unlike that of some modern trees—the most ancient fragment of 














a OOS SO OS =< Z ¥ wg Z 
NLEBBERese sere t DOS aN 
Reaaeaaneseles 
Lv ZEA ees. 
3 DPB Py Oy OR A _ EZ _m— i 
SE eC mmam es 
O \_ JPRS AROS ana ese = 
PS _ TT BRP PRBOP SEAS DUE PRE, SS 
SRD) Spay 2 SS ; 


Wy fig 
REIL WN ANNRROI Ls, 
SARTRE 
ast 
NN 
ON 
Sd 

Fig. 332.—Lower Oup Rep SANnpsTonE F1suEs. 
a, Cephalaspis Lyelli (Ag.) (side view), restored by Prof. E. Ray Lankester, F.R.S. ; 
b, Osteolepis microlepidotus (Sedgw. and Murch.), restored by Dr, R. H. Traquair, 
F.R.S.; c, Dipterus Valenciennesii (Sedgw. and Murch.), from a sketch by Dr. 
Traquair ; d, Coccosteus decipiens (Ag.); e, Acanthodes Mitchelli (Kg.), Forfarshire, 
from a sketch by Mr. B. N. Peach, 
an angiospermous exogen yet discovered. So abundant are these 
vegetable remains that in some layers they actually form thin seams 
of coal. : 
1 Prototaxites, included by Dr. Dawson among the Conifera, is relegated by Mr. 
Carruthers to the Algze under the name of Nematophycus—a genus also found in the 
Upper Silurian rocks of N. Wales.—Month. Microscopical Journ. 1872. 
