264 THE REIGN OF LAW. 



ences of sex, are far greater than the differences 

 which separate species and even genera. There 

 are insects of which the male is a fly, whilst 

 the female is a worm. There are many other 

 cases of correlation between different growths in 

 respect to which the nature and source of the 

 connexion is equally unknown. For example, 

 the complex stomachs of the Ruminant Order are 

 uniformly associated with a particular form of 

 hoof. Sometimes correlations the most constant 

 and invariable are at the same time the most 

 subtle and the most secret, because they are hid 

 under other growths which are not so correlated 

 and which produce total diversities of outward 

 aspect. One very curious class of correlations is 

 the correlation between the internal structure of 

 the teeth in animals, and the structure of other 

 very distant portions of their frame. There lately 

 was, for example, in the Zoological Gardens a little 

 animal, the Hyrax, not unlike a Rabbit in gene- 

 ral appearance, and very like it in habit. It is 

 the " Cony" of Scripture. Now this little animal 

 will be found on examination to have limbs which 

 do not terminate in a foot like a Rabbit, but in a 



