INDEX. 



423 



Mivart, Professor, declares it to be 

 "nothing," and a puerile 

 hypothesis, 370, 371 



declares the causes of varia- 

 tion to be the causes of the 

 distinction of species, 370 



Model, artificial, of a foot, and true 

 foot, difference between, 24 



Modification. It is only on modi- 

 fication that reason reasserts 

 itself, 55 



there have been two factors 



of, one producing variations, 

 and the other accumulating 

 them, 227 



arrived at by struggle round 



three great wants, Erasmus 

 Darwin on, 226-229 



Lamarck on the same, 257, 



279, 300, 301 



the cause of survival, not 



survival the cause of modi- 

 cation, 302 



Moral, an organism is most, when 

 looking a little ahead, but 

 not too far, 44 



struggle, the history of or- 

 ganic development, the his- 

 tory of a, 45 



more, and safer, to be behind 



the age than in front of it, 

 401 



Movement, Buffon's great criterion 

 of sensation, 127 



Mummies, Egyptian, Lamarck on, 

 274, 275 



Murphy, Rev. J. J., mentioned, 22 



referred to, 66, 67 



Mutability of species commonly 

 held to be incompatible with a 

 belief in design, 9, 10 



Mystery-mongering, that Buffon 

 wished to protest against, 81, 171 



Mystification, scientific, and ortho- 

 doxy, Buffon on, 138 



NAIVELY, as Mr. Darwin naively 

 adds, "sometimes equally con- 

 venient," 354 



Natural selection, the essence of the 

 theory is that the variations 

 shall have been mainly acci- 

 dental, 7 



Natural selection, the unerring 

 skill of, 9 



Sir William Thomson and Sir 



John Herschel on, 10 



Buffon, and, "by some chance 



common enough with Na- 

 ture," 122 



spoken of as though synony- 

 mous with descent with 

 modification, 248, 285, 356 



C. Darwin attributes the in- 

 stincts of neuter insects to, 

 249 



Mr. Patrick Matthew and, 323 



like the secretion of a cuttle- 

 fish, 332 



G. H. Lewes's objection to C. 



Darwin's language concern- 

 ing, 346 



if this is declared to be a 



cause, the fact of variation 

 is declared to be the cause of 

 variation, 347 



declared by C. Darwin to be 



a means of variation, 347 



treated as a cause, 348 



G. H. Lewes on, 348, 349, 350 



identity with " conditions of 



existence," 351-354 



according to C. Darwin, 



"fully embraces" and yet 

 "is included in" conditions 

 of existence, 355 



a cloak for want of precision 



of thought, and of substan- 

 tial difference from Lamarck, 

 358 



"some have even imagined 



that it induces variability ; " 

 and small wonder, consider- 

 ing C. Darwin's language 

 concerning it, 362 



C. Darwin's reply to those 



who have objected to the 

 term, 362-368 



a cloak of difference from C. 



Darwin's predecessors, under 

 which there lurks a con- 

 cealed identity of opinion as 

 to main facts, 362, 363 



" implies only the preserva- 

 tion of such variations as 

 arise," &c., 363 



