ANATOMICAL ANALOGY OF ANIMALS 171 



transgressed. One organ is at its highest state of 

 perfection in one species of animals and another 

 organ is the most perfect in a different species, so 

 that if the species are to be arranged after each 

 particular organ, there must be as many scales 

 formed, as there are regulating organs assumed. 

 You cannot construct a general scale of perfection 

 which will apply to all animals. 



No two species sufficiently resemble each other 

 to form a proper band of connection, and yet there 

 is a uniformity of structure in all, and only five 

 distinct plans upon which the animal structure 

 is classified by zoologists. Take the monkey which 

 is of the mammalia class, and most nearly related 

 to man, and the anatomical arrangements are the 

 same, bone for bone, and muscle for muscle, and 

 yet you can take the sternum, ribs, legs, arms, and 

 hands of a lizard, and they too correspond to that 

 of man. The limbs of all the vertebrate animals 

 are of the same plan, however various they may 

 appear. In the hind leg of a horse, for example, 

 the angle called the hock is the same part which in 

 man forms the heel, and the horse, and many other 

 quadrupeds, walk upon what answer to the toes of 

 a human being. In many animals the fore part 



