282 DIRECTIONS. 
Unie. They may all be tenable; and I would 
mot in any case, set up my doubts against the con- 
victions of these industrious naturalists. But I 
prefer delaying any farther adoption of their new 
species, until they have extended their collections 
and made farther comparisons. I have the same 
objections to the adoption of other proposed new 
species of animals from other naturalists, which I 
might have introduced for students’ exercises. I 
consider this part of Natural History as very un- 
settled in America; and that it is, as it were, just 
emerging from a chaotic state—it is so, at any rate. 
in my own min, 
