FULLER QUOTATIONS FROM ' ZOONOMIA: 225 



pigeons admired for their peculiarities which are more 

 or less thus produced and propagated.* 



" When we consider all these changes of animal form 

 and innumerable others which may be collected from 

 the books of natural history, we cannot but be convinced 

 that the fetus or embryon is formed by apposition of 

 new parts, and not by the distention of a primordial 

 nest of germs included one within another like the 

 cups of a conjurer, 



" Fourthly, when we revolve in our minds the great 

 similarity of structure which obtains in all the warm- 

 blooded animals, as well quadrupeds, birds, and amphi- 

 bious animals, as in mankind; from the mouse and 

 bat to the elephant and whale; one is led to con- 

 clude that they have alike been produced from a 

 similar living filament. In some this filament in its 

 advance to maturity has acquired hands and fingers 

 with a fine sense of touch, as in mankind. In others it 

 has acquired claws or talons, as in tigers and eagles. 

 In others, toes with an intervening web or membrane, 

 as in seals and geese. In others it has acquired cloven 

 hoofs, as in cows and swine ; and whole hoofs in others, 

 as in the horse : while in the bird kind this original 

 living filament has put forth wings instead of arms or 

 legs, and feathers instead of hair. In some it has pro- 

 truded horns on the forehead instead of teeth in the 

 fore part of the upper jaw ; in others, tusks instead of 

 horns ; and in the others, beaks instead of either. And 

 all this exactly as is seen daily in the transmutation of 

 • ' Zoonomia,' vol. i. p. 505. 



Q 



