INDEX.
V.
Danaidce : protective elasticity of,
166-7 ; acquisition of protective
nauseous secretions by, 217.
Darwin, Charles : on variation,
4-5, 6, 10, 19, 146 ; on law of cor
related variation, 334, 338-40,
341, 343-7 ; of instincts, 279-80,
284; ofNiataox, 427; of imported
plants, 534 ; on unuseful varia
tions, 306, 410, 411 ; on useful
variations, 421, 422 ; on causes
of variability, 365-6 ; on natural
“Preservation,” 15 ; on Struggle
for Existence, 17-9, 43, 76,96,97 ;
on Survival of Fittest, 23, 145 ;
amongst gulls, 443 ; amongst
owls, 443 ; amongst scarlet-run
ners, 33-4, 139-40 ; on chance,
27-9, 60; on evolution of human
eye, 33 » on Sexual Selection, 36,
37-8, 38-9 ; on romantic love in
animals, 38-9 ; on rate of increase
of man and elephants, 46 ; on
destruction of life as a check to
natural rate of increase, 47, 57 ;
his relation to Malthus, 50 ; on
increase in imported plants, 52 ;
on rarity of species, 57 ; on ac
cidental destruction of life, 62 ;
on indiscriminate destruction of
life in seedlings, 66 ; on the
element of time in variation,
72-3 ; on animal sociability, 88 ;
on co-operation amongst ba
boons, 93 ; amongst hawks, 93 ;
on Natural Selection, 104-5, 138,
146, 158; principle of Natural
Selection, 466, 485-6; difficulties
connected with Natural Selec
tion, 467, 468 ; slow action of
Natural Selection, 399; on an
alogy between Natural and
Artificial Selection, 131 ; on
“Methodical” and on “Uncon
scious” Selection, 136-8; on
Artificial Selection, 139, 153;
in relation to sheep-breeding,
139; on power of Forelle-pear
to resist cold, 145 ; on protective
colouration among dragon-flies,
173; on influence of environ
ment, 167, 395-6, 400-1, 431 ;
on cats, dogs and sheep, 423 ;
on feral pigs, 429; on proteus,
Darwin, Charles—(continued).
543 ; on influence of climate on
organic structure, 397-8 ; on in
fluence of environment not pro
ducing useful results, 412 ; on
change of environment in rela
tion to sexual reproduction, 533 ;
on inutility of some organic
colouration, 204-5 1 on skin-pig
ments the cause of nauseous
taste, 220 ; on instinct, 221, 228,
278-9, 279 ; on barking instinct in
dogs, 256; on instincts in ants,
269-70; on neuter insects, 267-8 ;
on sterile insects, 271 ; on vege
table sensitiveness, 286 ; com
parison of gold-fish and carp,
296 ; Transmutation of Species :
nature of conditions subordinate
to nature of organism, 310 ; in a
confined area due to Natural
Selection alone, 430 ; influence of
changed conditions on, not al
ways rapid, 425-6, 430 ; on form
and habits of water-ouzel, 312 ;
on extinction of species, 316 ;
of horse, 318 ; on the petrel,
323-4 ; on co-existence of two
variants in same district, 326 ;
on law of compensation of growth
335-6 ; on law of homology, 337 ;
on evolution of elk from stag,
343> 345-6 ; on hybridisation,
350-2 ; on recent evolution of
ancon and merino ram, 358-9 ;
of breeds of dogs, 359 ; on An
con, Jaguar and Pariah-dog, 359 ;
on abrupt structural modifica
tions, 359-64 ; on antlers and
spike-horns, 362-3 ; on human
physical heredity, 364 ; on iso
lation in breeding, 380-1 ; on
physiological barriers to breed
ing amongst variants, 382 ; on
shape of skull in pig, 427-8 ; on
inherited effects of use and dis
use, 438, 439-40, 44 b 442 ; on
disuse as agent in formation of
rudimentary organs, 511 ; his
acceptance of Lamarckian prin
ciples, 472 ; on ‘ nihilper saltum]
487 ; on rudimentary organs, 494,
496,497-8; on conformity of type,
500 ; on degeneration a result of