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arrangement according to family is good and sensible. Look at a spider ; what 

 does he remind you of, when you take into consideration his mandibles as weapons 

 of defence ' Look at him, and think about scorpions, lobsters, and crabs. He is 

 very nearly related to them. His position in the scale of animals is there. If you 

 try to find a better place for him, you cannot. In your classical scheme, he is 

 rightly put there. 



