Index. 199 



Selection, natural, difficult to conceive why it should have pro- 

 duced in the same country similarly coloured races of different 



families, 79 



, can have no relation to crystals, 108 



, will not explain how the higher races of animals were 



evolved out of the lower, 122 

 , would have promoted hardiness, fertility, and early 



maturity rather than have produced complex organs, 123, 



124 

 , not likely to have produced relations like those we see 



between species of the same genus, 130, et seq. 

 , sexual selection would seem to run in the teeth of, 



138 

 , Mivart's objections to, really tell against evolution in 



any form, 150 

 is a fact, and objections to Darwinism must have their 



bearing against some other part of the hypothesis, 151 

 , sexual, Darwin's theory of, not very consistent with his 



general principles, 137 

 , the theory of, involved in all the nebulous vagueness 



of Darwinism generally, 140 



, absence of evidence for, 138-140' 



, Grant Allen's attempt to account for, adverted to, 



142, et seq. 

 , Grant Allen's attempt to account for, removes none 



of the difficulties connected with the subject, 146 



, is a dream, 170 



Sheep, domestic races of, their origin unknown, 49 



, wild, fourteen races of, according to Blyth, 49 



, Anderson's views on, 49 



in tropical countries, 50 



, Mau champ Merino, its origin, 50, 51 



, Ancon, its origin, 51, 52 



Silver greys (rabbits), their permanence, 54, 55 



Sivatherium, Indian, extinct ruminant, 48 



Size, large, an advantage in some respects, a disadvantage in 



others, 127 



