Xll PREFACE. 



therefore, it is adduced as the efficient cause of the 

 supposed transmutations of lower into higher animal 

 forms, one phantom is virtually conjured up as the 

 cause of another. 



The doctrine of Evolution in general, however, 

 without any attempt to explain its cause, appears to 

 be somewhat more defensible by itself. And for 

 this reason, I think that Mr. Huxley, my friend and 

 former pupil in Physiology at the Charing Cross 

 Hospital, the ablest General perhaps whom the Bri- 

 gades of the ' Evolutionary Army ' can boast of, 

 shows good strategy by manoeuvring chiefly in de- 

 fence of the position of Evolution pure and simple. 

 Even Professor Haeckel, who pipes so lustily in 

 praise of Darwinism that he might be appropriately 

 viewed as Piper to the Fairy-dance described in the 

 lines with which I conclude my first lecture, has for 

 the burden of his tune : ' Phylogenesis recapitulated 

 in Ontogenesis' 



In his notice of Professor Haeckel's book on 

 Anthropogenesis in the journal called the ' Academy ' 

 for January 2, 1875, Mr. Huxley adduces, as an 

 example of what Geology teaches in favour of Evo- 

 lution, the actual historical process, as he considers it, 

 by which one species of animal now living, the horse, 

 came into existence during the Tertiary epoch. ' The 

 evidence,' says Mr. Huxley, ' based on the analogy 



