INDEX OF SUBJECTS AND OF NAMES. 
Abortion : v. Rudimentary Organs. 
Aconitum napellus, imported : vari 
ation in, 534. 
Acraeidce : protective elasticity of, 
166-7. 
Agrionidce: protective coloura 
tion of, 173. 
Allen, Grant : on colouration of 
arctic fauna, 189-90 ; on survival 
of fittest amongst wasps, 272-3. 
Allen, J. A. : on variations in 
birds, 488. 
Allium : its storage of water, 413. 
Altum, Dr. B. : on sudden great 
increases and subsequent pos 
sible great destruction of mice, 
53- 
Amblystoma : v. Axolotl. 
AMERICAN NATURALIST 
(quoted by Darwin): on spike 
horned buck, 361. 
Amoeba : instinct in, 237 ; propa 
gation by fission, 577 ; Herbert 
Spencer on, 567, 570. 
Amphimixis : 370-1. 
Ancon Dogs, Jaguar, Ram : v. 
Dogs, Jaguar, Ram. 
Animals “ made for use of man ” : 
124-30. 
Antelopes : Survival of Fittest 
among, 63 ; utility of specific 
variations in, 418—v. also Deer. 
Ant-lion, larva of: instinct in, 234. 
Ants : instinct and character in, 
258 ; queens and workers pro 
duced from same or different 
kind of eggs, 268. 
Aphides : potential rate of increase, 
46 ; protective secretion of, 166. 
Argyll, Duke of : on protective 
colouration of birds, 185 ; on in 
stinct in water-ouzel, 221-3 ; on 
special creation, 521. 
Arnold, Matthew : Empedocles 
on Etna quoted, 4, 8. 
Arrested Development : 543-9. 
Artemia : variation in, 536-7. 
Artificial Selection : analogy of 
Natural Selection to, 130-56. 
“ Methodical ” and “ Un 
conscious ” (Darwin), 136-7. 
Asses, Imported : rapid multiplica 
tion of, 52. 
Athleticism, Hereditary : 434-5. 
Aveling, Dr. Edward : on sen 
sitive faculties of sun-dew, 286-7 ; 
on the hypothesis of Natural 
Selection, 454. 
Axolotl : transmutation of, into 
Amblystoma, 546-7. 
Baboons : co-operation amongst, 
93- 
Bailey, Prof. : on the influence of 
external conditions on squashes, 
396- 
Baker, Sir S. W. : on struggle for 
existence, 22-3 ; on indiscriminate 
destruction of life in nature, 62 ; 
on parental devotion of cow, 82 ; 
on co-operation amongst birds of 
prey, 92. 
Balancement, Law of : 335-6. 
Balfour, F.M. : on the Darwinian 
theory, 462-3 ; on limbs of higher 
vertebrata, 503 ; on sensitiveness 
of cells, 573-4, 575. 
Ball, J. : on geographical distri 
bution, 531. 
Ball, W. P. : on the effects of use 
and disuse, 432 ; on law of 
economy, 512. 
Baptanodon discus : an illustration 
of conformity to type, 502, 503, 
506. 
Barber, Mrs. : on influence of 
environment on colouration of 
caterpillar, 408. 
Bastian, Dr. H. C. : on animal 
instincts, 286.