L, Lesquereux on the Coal Formations of N. America. 73 
fore, the difference pointed out by the table, may be admitted as 
fairly representing, in a proportional manner, the general distri- 
a 
=] 
A 
| 
— 
<i 
) 
| 
—_ 
nd 
ee 
= 
% 
ie 
ix) 
— 
= 
a) 
rc) 
Qu 
rt 
je) 
ee 
5S 
ef 
oO 
2 
° 
os 
= 
ct 
a 
oO 
(ej) 
= 
o 
8 
© 
=] 
=. 
oO 
0g 
| 
o 
rs 
Ss 
io 
e 
ox 
oo 
b> 
5 
oO 
a 
Q 
> 
od 
Sa 
fa*) 
al 
ce 
oO 
=i 
= 
[=] 
dg 
3 
MS 
Lo | 
oO 
wm 
oO 
pc) 
~~ 
Q 
Yk 
oO 
w 
oo 
° 
co 
ig 
Oo 
TM 
(o} 
S 
ct 
er 
and two more are so closely allied to their European congeners 
istinguished 
