6 GENESIS OF MAN. 



bryos, so much so that he was quite unable to say to what animals 

 two specimens which he had preserved in alcohol but had neglected 

 to label, really belonged. Still less attention has Darwin paid to 

 this source of argument in his Descent of Alan. A few lines quoted 

 from Von Baer and from Huxley, on page 14 of Vol. 1, a figure of 

 the embryo of a human being and one of a dog, from Ecker, on 

 page 15, with brief comments, disposes of this branch of his great 

 argument. Almost as much had been said by the author of the 

 Vestiges of Creation, in 1 842.2 It is safe, therefore, to assume 

 that at the time of the appearance of the Origin of Species (1859), 

 Darwin had no conception of the real part that the arguments from 

 embryology were destined to play in establishing his doctrine 

 of the development of organic forms. And although in subse- 

 quent editions he was able to notice the Generelle Morphologic, it is 

 still improbable that even then he had any adequate idea of the 

 powerful ally he was to have in Germany, as the Naturliche Sch'dpf- 

 ungsgeschichte, and not less the work under review, have proved 

 the professor of Jena to be. '* It is of the former of these works 

 that Darwin says that if it had appeared before the Descent of 

 Man had been written, he would probably never have completed 

 the latter. 



Professor Haeckel is no mere disciple of Darwin, profound as is 

 his admiration of him, and unreserved as is his expression of that 

 admiration. His own countrymen have accused him of being 

 " more Darwinistic than Darwin himself," but it is clear that a 

 large part of this difference is in kind rather than in degree, and 

 that he has infused into the developmental philosophy a true 

 Haeckelian element. It is true that he drew the logical conclusion 

 from the premises furnished by the Origin of Species five years be- 

 fore the announcement of its recognition by Darwin himself in his 

 Descent of Man. This conclusion he boldly and forcibly enunci- 

 ated in the introduction to his Generelle Morphologic, published in 

 1866, and reiterated with still greater emphasis in his Naturliche 

 Scliupfungsgeschichte , in 1 868. Between this period and that of the 

 appearance of the Descent of Man, Haeckel was exposed to the 

 bitterest attacks, not only from the adherents of the Church and 

 the opponents of Darwin generally, but from those adherents of 

 Darwinism in Germany — and they were many — whose conception 



2 New York, 1845, p. 150. 



