62 ON THE GEOGRAPHY OF ANIMALS. 
(86.) The ducks, and other swimming families, are 
nearly the same in both continents ; but very few ae the 
American waders re- 
semble those of Europe. 
The grouse of the two 
continents, inhabiting the 
same parallels of latitude, 
are still more distinct ; 
only one, or at most two, 
having been found in 
Europe and America. 
—<—ucee ~~ ‘The commonest of these 
is the Tetrao ees. L., or Canadian grouse (fig. 20.); 
about the size of the red game, but with the throat and 
breast glossy black. 
(87.) Respecting the other animals of this part of 
America nothing can yet be stated, since the researches of 
Dr. Richardson, whose valuable remarks have furnished 
the materials of the foregoing results, are not yet before 
the public; and little reliance can be placed on the 
erroneous compilations and crude theories regarding 
American zoology, which heretofore have been our only 
guides. | Few naturalists have done as much, and, 
perhaps, none have done more, towards elucidating the 
zoological distribution of animals of this country, than 
the diligent observer above named: his simple and un- 
pretending narrative has cleared from our systems a 
mass of “ learned error” and unintelligible nomencla- 
ture, which will sink our former authorities upon Arctic 
zoology into oblivion. The entomological collections of 
the northern expeditions, fortunately for science, have 
been placed by Dr. Richardson in the hands of Mr. 
Kirby, who has now been engaged some years in pre- 
paring this volume for the press 
(88.) The second or temperate region of the American 
province comprehends the whole of the United States, 
with a considerable portion, probably, of the north-west 
coast ; while its termination (much better understood 
than its northern limits) is marked by the Gulf of 
