XXXViil SEVENTH REPORT—1837. 
rica—the tapir and the peccary; and of these, the last only is found 
in North America. Yet no region can boast of more numerous, or 
more gigantic species of fossil animals of this order—as elephants and 
mastodons—and, what is remarkable, though the present race of horses 
is acknowledged to be not indigenous, fossil bones of the horse were 
found on the N.W. coast by Capt. Beechey mingled with those of ele- 
phants. Of the Ruminantia, two only seem to be common to the Old 
and New World—the reindeer and the elk—unless we admit that the 
argali of Siberia is the same-as the sheep of the Rocky Mountains. 
The Cetacea, as might be expected from their mode of life, may be 
considered as common to both worlds. The Rytina Borealis and 
Manatus Americanus are found in North America, but not in the seas 
of Europe. Temminck estimates that we have 930 well ascertained, 
and 140 doubtful species of Mammifera; of these 207 are in the New 
World, and 169 in North America. The birds of North America are 
most numerous, and have heen illustrated by the successive labours of 
Pennant, Wilson, the Prince of Musignano ; but, above all, in the Fauna 
Boreali-Americana of Richardson and Swainson, and the superb work 
of Audubon. The similarity between the birds of Europe and North 
America is marked by one third of the species being common to both 
Faune. These are chiefly to be found among the Grallatores and 
Natatores, two-thirds of which orders are common to both: of the 
order Rapaces several are common to both continents. The Insessores 
are very numerous, and a great number are peculiar to America. The 
Rasores, in all countries, are little disposed to migrate ; and almost all 
of this order found in America are peculiar to it, with the exception of 
some pigeons and a few Arctic grouse. 
The Reptilia of North America are exceedingly numerous. All, 
with the exception of some sea-turtle, are distinct from those of the 
Old World. Two genera equally fitted to live in water and in air, as 
possessing both gills and lungs, and represented by the Siren lacertina 
and Menopoma gigantea, which abound in North America, have only 
one analogous animal in the Old World, the Proteus anguinus of the 
lakes and caves of Carniola. 
Many species of the fishes of the American seas are found else- 
where ; but the only fresh-water fish, common to both worlds, appears 
to be the pike; yet it is singular, that it does not occur in the waters 
to the west of the Rocky Mountains, although there the two continents 
are more approximated. Some of the family of the Salmonide and 
Clupiade, which visit America, have much resemblance to those of 
Europe. 
