All tJie Articles of the Darwin Faith. 7 



I believe that long tails are necessary to animals in hot 

 countries to give them the " power of resisting the attacks 

 of insects," although I see that sheep have heavy tails 

 which they cannot and do not make use of for any such 

 purpose, and are especially attacked by flies on their heads, 

 which, if their tails were ever so light, they could not 

 possibly reach. 



I believe that as I hold that the swim-bladder in 

 creatures of the sea is modified into lungs in their descen- 

 dants changed into land animals the tail, having been so 

 useful to the former as a means of locomotion, still proves 

 its origin in the latter, though of so little use to them. 



I believe that the green colour of the green woodpecker 

 is due to selection by the male or female bird, because I 

 see that there are black and pied woodpeckers also. 



I believe that it is not the case that many structures have 

 been created for beauty in the eyes of man, or for mere 

 variety, although I "fully admit that many structures are 

 of no direct use to their possessors." 



I believe that there is "no logical impossibility in the 

 acquirement of any conceivable degree of perfection 

 through natural selection," although I must admit that 



