THE SILVER FOX. 
Can IS FULvus. Var. argentatus. 
The Black or Silver Fox of America exhibits a still 
further deviation from the typical colour of the species 
to which, in conformity with the opinion of Dr. Rich- 
ardson, we have referred it without hesitation, notwith- 
standing that its distinction by M. GeofFroy-Saint-Hilaire 
has been recognised by Baron Cuvier and almost every 
zoologist of the day. On this point we can only repeat 
that we believe them to have formed an erroneous judg- 
ment, in consequence of the want of sufficient materials 
for comparison, the intermediate variety not having, so 
far as we are aware, been hitherto zoologically studied 
in a living state in Europe. 
From the imperfect means in his possession, M. F. 
Cuvier some time since conjectured that the Cross and 
Silver Foxes were varieties of the same species. That 
