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4 ; 
of North America with those of Europe. 369 
to prove that the old red sandstone in America is more recent 
than the schists and the limestones which represent the deposits 
of the Hifel, the Hartz, and of Devonshire. 
The different groups of the Paleozoic formation of America, 
which we unite in the Devonian system of Europe, have with 
this a great number of identical fossils. We have recognized the 
following species: Holoptychus nobilissimus, teeth of Dendro- 
dus, Asterolepis, Phacops macropthalmus, Crypheus calliteles, 
Goniatites retrorsus, Bellerophon striatus, Murchisonia bilineata, 
Chemnitzia nevilis, Avicula Damnoniensis, Pterinea fascicu- 
lata, Modiola squammifera, Inoceramus chemungensis, Car- 
dium loricatum, Lucina proavia, L. rugosa, Grammysia hamil- 
tonensis, Sanguinolaria dorsata, Terebratula cuboides, T. reticu® 
laris and aspera, T’. concentrica, Spirifer mucronatus, S. ma- 
cropterus, S. cultrijugatus, S. heteroclitus, S. Verneuili, Orthis 
striatula, O. umbonata, O. crenistria, Leptena depressa, L. Du- 
tertrtt, L. laticosta, Chonetes nana, Proeductus subaculeatus, 
Favosites gothlandica, Porites interstincta, Stromatopora con- 
centrica, Pleurodyctium problematicum. 
The common characters which unite the Devonian fauna of 
America and Europe, are the appearance of those great ganoid 
fishes of which the skin was composed of solid plates with sha- 
greened surfaces, and that of the genera Goniatites, Nautilus, 
Pentremites and Productus, which have not to this time been 
authentically recognized in Silurian deposites. ‘The greater part 
of the species which we have enumerated are found in the lime- 
Stones of Devonshire, of Brittany and the Eifel, some others in 
the schists which are inferior to them and connected with them ; 
thus the Asterolepis, Phacops macropthalmus, Bellerophon stria- 
tus, Murchisonia bilineata, Chemnitzia nevilis, Inoceramus 
chemu is, Cardium loricatum, Lucina proavia, L. rugosa, 
ngensis, 
Sanguinolaria dorsata, Terebratula cuboides, T. reticularis and 
Grammysia hamiltonensis, Pterinea fasciculata, Spirifer a ttudl 
cropterus and Pleurodyctium problematicum, belong to the schists 
Devonian system occupies in the state of New York, a 
more considerable area than the Silurian system. As it is prin- 
it pea ee 
The presence of these species furnishes an argument in favor of the opinion 
of Mr. Romer, w eb Tak ke hol gi g are age ag . ystem, 
