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* Denison, Sir W., manner of ridding themselves of vermin among the Australians, 57; extinction of Tasmanians, 184.
 * Denny, H., on the lice of domestic animals, 169.
 * Dermestes murinus, stridulation of, 302.
 * Descent traced through the mother alone, 588.
 * Deserts, protective colouring of animals inhabiting, 489.
 * Desmarest, on the absence of suborbital pits in Antilope subgutturosa, 529; on the whiskers of Macacus, 531; on the colour of the opossum, 534; on the colours of the sexes of Mus minutus, 534; on the colouring of the ocelot, 534; on the colours of seals, 535; on Antilope caama, 536; on the colours of goats, 536; on sexual difference of colour in Ateles marginatus, 537; on the mandrill, 539; on Macacus cynomolgus, 558.
 * Desmoulins, on the number of species of man, 174; on the musk-deer, 530.
 * Desor, on the imitation of man by monkeys, 72.
 * Despine, P., on criminals destitute of conscience, 116.
 * Development, embryonic, of man, 9, 11; correlated, 426.
 * Devil, not believed in by the Fuegians, 95.
 * Devil-crab, 269.
 * Devonian, fossil insect from the, 289.
 * Dewlaps, of cattle and antelopes, 531.
 * Diadema, sexual differences of colouring in the species of, 309.
 * Diamond-beetles, bright colours of, 294.
 * Diastema, occurrence of, in man, 35.
 * Diastylidæ, proportion of the sexes in, 255.
 * Dicrurus, racket-shaped feathers in, 384; nidification of, 453.
 * macrocercus, change of plumage in, 461.
 * Didelphis opossum, sexual difference in the colour of, 533.
 * Differences, comparative, between different species of birds of the same sex, 470.
 * Digits, supernumerary, more frequent in men than in women, 223; supernumerary, inheritance of, 232; supernumerary, early development of, 237.
 * Dimorphism in females of waterbeetles, 276; in Neurothemis and Agrion, 291.
 * Diodorus, on the absence of beard in the natives of Ceylon, 560.
 * Dipelicus Cantori, sexual differences of, 296.
 * Diplopoda, prehensile limbs of the male, 274.
 * Dipsas cynodon, sexual difference in the colour of, 351.
 * Diptera, 280.
 * Disease, generated by the contact of distinct peoples, 183.
 * Diseases common to man and the lower animals, 7; difference of liability to, in different races of men, 167; new, effects of, upon savages, 182; sexually limited, 237.
 * Display, coloration of Lepidoptera for, 314; of plumage by male birds, 394, 402.
 * Distribution, wide, of man, 48; geographical, as evidence of specific distinctness in man, 169.
 * Disuse, effects of, in producing rudimentary organs, 12; and use of parts, effects of, 32; of parts, influence of, on the races of men, 197.
 * Divorce, freedom of, among the Charruas, 598.
 * Dixon, E. S., on the pairing of different species of geese, 415; on the courtship of peafowl, 419.
 * Dobrizhoffer, on the marriage-customs of the Abipones, 599.
 * Dobson, Dr., on the Cheiroptera, 218; scent-glands of bats, 529; frugivorous bats, 534.
 * Dogs, suffering from Tertian ague, 8; memory of, 74; dreaming, 74; diverging when drawing sledges over thin ice, 75; exercise of reasoning faculties by, 78; domestic, progress of, in moral qualities, 80; distinct tones uttered by, 84; parallelism between his affection for his master and religious feeling, 96; sociability of the, 100; sympathy of,