THE CORNIFEROUS FAUNA 429 
chian province, and the associated species are such as to leave 
no doubt in regard to the entire fauna being a representative of 
the Corniferous fauna of the interior basin. In another place, 
from the same general region, Whiteaves’* has recorded a fauna 
of ten species with the following remark: 
The fossils described or mentioned above show clearly that the rocks 
from which they were collected are of Devonian age, also that they belong to 
the horizon of the Corniferous limestone. 
Of these ten species, six are corals, and one, Macropetalichthys 
sullivant, is one of the most characteristic of the fishes found in 
the fauna in Ohio. 
The Devonian faunas of the Arctic region are practically 
unknown, but two genera of the Corniferous fishes of the Appala- 
chian province, Acanthaspis and Onychodus, are known to occur 
in the Devonian strata of Spitzbergen.? Nine of the total 
thirteen genera are also known from the middle Devonian of the 
Eifel region of Germany, and three from Bohemia. Many of 
the invertebrate members of the Corniferous fauna also have rep- 
resentatives in the middle Devonian faunas of central Europe. 
From the geographic distribution of the Corniferous fauna, 
it may be suggested that the province in which it originated was 
situated somewhere in the Arctic regions, and that representa- 
tives of it migrated southward both into North America and into 
Europe. It has been suggested elsewhere} that the typical 
Niagaran fauna, as it exists in the Appalachian province, came 
into the region from the north through the junction of the 
Hudson’s Bay basin with the interior basin, and, when it with- 
drew from the interior, it doubtless followed the same route by 
which it had entered. During the period of disturbance or read- 
justment between Silurian and Devonian time it is not improbable 
that the restricted Niagaran fauna became isolated in the Arctic 
region, and that from the elements of this fauna, during a long 
period of time, the Corniferous fauna evolved: This hypothesis, 
t Geol. Surv. Canada, “ Rept. of Prog., 1875-76,” pp. 316-20. 
2 Private communication from Dr. C. R. Eastman. 
3Jour. GEOL., Vol. VII, p. 692. 
