ADVERTISEMENT. 
It has been already stated, in the author’s 
treatise on the order Quadrumana, that his 
principal inducement to undertake the arduous 
and extensive task of describing the vertebrated 
division of the animal world, was for the pur- 
pose of publishing the graphic illustrations, 
which are selected from a very extensive col- 
, lection of original drawings of animals from 
nature, in his possession. 
In addition to his own collection, the kind- 
ness and liberality of a friend have now also 
supplied him with the use of perhaps the 
most valuable set of zoological drawings in the 
kingdom, amounting to about four thousand in 
number ; and it would be highly ungrateful, as 
well as extremely impolitic, to omit the earliest 
opportunity of acknowledging, how much the 
