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ment, "I could scarcely believe my eyes, when 

 I noticed this for the first time in my series of 

 sections. Subsequently, these little hooked 

 appendages to the thorax grow into horns, and 

 serve as organs of touch and exudation, and 

 enable the fly to balance itself, and no trace of 

 likeness to wings remains." 



Seeing is, of course, believing, and Father 

 Wasmann, unable to withstand the force of this 

 convincing evidence, adds : " Probably we have 

 here a certain amount of reproduction of the 

 growth of some ancestors." We are glad to 

 find Father Wasmann prefixing " probably" to 

 the results of his marvellous discovery, but 

 soon his enthusiasm seems to get the better of 

 him and he tells us, "I might refer to a number 

 of similar instances, but what has been said 

 will suffice to show that there are really cases 

 in which the evolution of the individual gives 

 us a clear indication where to seek the ances 

 tors of the race." So far, Father Wasmann's 

 mental processes are sufficiently clear on the 

 subject ; but what follows seems to be envel 

 oped in fog and mystery. He adds: ''Never 

 theless, if we are to explain such a stage of 



