2O2 Index. 



Tapir and horse, links between, 133 



, races of, in South America and Indian Archipelago, 162 



Tett-ao urogallus and tetrix, their intermixture under nature, 77 



Transmutation, supposed, of the Porto Santo rabbit, 55 



, a cause purely conjectural, 77 



now read into facts, 79 



Transmutationists, the pigeon supposed to be the strong point 

 of, 58 



Twopenny, Bakewell's longhorn bull, 46, note 



Tylor, Burnet, 57 



Types, animal, all logically equivalent to the types of man sup- 

 posed by Linnaeus to spring from one stock, I 



Type horse and type ass, 21 



Types of domestic pigeon, Sanson on, 67, 68 



, living, the origin of, presumptuous to determine that we 



shall never know, 94 



, contemporary (with fossil Edentata), some have survived, 94 



, natural selection does not by itself account for the origin 



of new, 151 



, variability of living, doubtful, 151 



, living, not produced by evolution under existing conditions, 



153 



, Chinchilla, formerly in West Indies, 159 



, all, at one time cosmopolitan, 161 



V 



Variability, the notion of limited, 3, 64 



fluctuating in the cat, 31 



, individual, in the fowl, 70 



, specific, Mivart's remarks on, 150 



, unlimited, of living types, Darwin's best work tends really 



to disprove, 151, 152 



, indefinite, no grounds for supposing, 151 



Variation, spontaneous, 14 



