212 Darwin, and after Darwin. 
Fic. 107.—Wild Boar contrasted with a modern Domesticated Pig. 
Drawn from life (Zoological Gardens, and prize spccimen). 
The exizencies of space have prevented, in some of 
the groups, strict adherence to a uniform scale—with 
the result that contrasts between different breeds in 
respect of size are not adequately rendered. This 
remark applies especially to the dogs; for although 
the artist has endeavoured to draw them in perspective, 
unless the distance between those in the foreground 
and those in the background is understood to be 
more considerable €hamit appears, an inadequate idea 
is given of the relat ifferences of ‘sizem; The most 
instructive of the ‘groups, I think atg of the* 
Canaries ; becauSe the’ many and great ‘changes, in 
