n8 LOUIS AGASSIZ. [CHAP. xvm. 



he always stopped short of complete deduction. For in- 

 stance, when he says, "in Bates's geographical varieties, 

 etc., we get about as near to' seeing a species made as we 

 are ever likely to get." Darwin and Huxley do not think 

 so. Gray leaned towards Owen's definition, that species 

 are somewhat derived genealogically, and he urges Dar- 

 win " not to insist much on natural selection, if you can 

 only have derivation of species"; and adds, "derivation 

 of species is to be the word." Finally, Gray accepts 

 the conclusions of Darwin as a "probable hypothesis." 



As to Lyell, he says in a letter to Darwin, " I cannot 

 go Huxley's length in thinking that natural selection 

 and variation account for so much, and not so far as 

 you, if I take some passages of your book separately. 

 I think the old ' creation ' is almost as much required 

 as ever, but, of course, it takes a new form if Lamarck's 

 views improved by yours are adopted ' ( " Life of 

 Charles Lyell," Vol. II., p. 363). 



In another letter also to Darwin, he says, " Lamarck's 

 belief in the slow changes in the organic and inorganic 

 world in the year 1800 was surely above the standard 

 of his time, and he was right about progression in the 

 main, though you have vastly advanced that doctrine " 

 ("Charles Lyell," Vol. II., pp. 365, 366). And farther on 

 Lyell entirely breaks with some of the main conclusions 

 of Darwin, as when he says, " I feel that progressive 

 development or evolution cannot be entirely explained 

 by natural selection. I rather hail Wallace's sugges- 

 tion that there may be a Supreme Will and Power 

 which may not abdicate its functions of interference, 

 but may guide the forces and law of Nature. . . . 



