A.

Abbot, C., on the battles of seals,
500.
Abductor of the fifth metatarsal,
presence of, in man, 42.
Abercrombie, Dr., on disease of the
brain affecting speech, 88.
Abipones, marriage customs of the,
598.

Abou-Simbel, caves of, 168.

Abortion, prevalence of the practice
of, 46.

Abstraction, power of, in animals, 83.
Acalles, stridulation of, 306.

Acanthodactylus capensis, sexual dif-
ferences of colour in, 357.
Accentor modularis, 473.
Acclimatisation, difference of, in dif-
ferent races of men, 167.
Achetidæ, stridulation of the, 282,
283, 285; rudimentary stridulating
organs in female, 288.

Acilius sulcatus, elytra of the female,
276.

Acomus, development of spurs in the
female of, 450.

Acridiidæ stridulation of the, 282,
286; rudimentary stridulating or-
gans in female, 288.

Acromio-basilar muscle, and quad-
rupedal gait, 42.
Acting, 178.

Actinia, bright colours of, 260.
Adams, Mr., migration of birds, 108;
intelligence of nut-hatch, 418; on
the Bombycilla carolinensis, 461.
Admiral butterfly, 312.
Adoption of the young of other ani-

mals by female monkeys, 70.
Advancement in the organic scale,
Von Baer's definition of, 164.
Aeby, on the difference between the

skulls of man and the quadrumana,
149.

Esthetic faculty, not highly deve
loped in savages, 93.
Affection, maternal, 70; manifestation
of, by animals, 70; parental and
filial, partly the result of natural
selection, 105; mutual, of birds,
410; shewn by birds in confine-
ment, for certain persons, 411.
Africa, probably the birthplace of
man, 155; South, crossed popula-
tion of, 174; South, retention of
colour by the Dutch in, 193; South,
proportion of the sexes in the but-
terflies of, 250; tattooing practised
in, 574; Northern, coiffure of
natives of, 575.

Agassiz, L., on conscience in dogs,
103; on the coincidence of the
races of man with zoological pro-
vinces, 169; on the number of
species of man, 174; on the court-
ship of the land-snails, 262; on the
brightness of the colours of male
fishes during the breeding season,
340; on the frontal protuberance
of the males of Geophagus and
Cichla, 340, 345; male fishes
hatching ova in their mouths, 345;
sexual differences in colour of chro-
mids, 345; on the slight sexual
differences of the South Americans,
561; on the tattooing of the Ama-
zonian Indians, 576.

Age, in relation to the transmissior
of characters in birds, 463; va-
riation in accordance with, in birds.
484.

Agelæus phoeniceus, 225, 416.
Ageronia feronia, noise produced by,
307.

Agrion, dimorphism in. 290.

nudi-branch mollusca, 264.
Allen, J. A., vigour of birds earliest
hatched, 212, 213; effect of dif-
ference of temperature, light, &c.,
on birds, 225; colours of birds,
422; on the relative size of the
sexes of Callorhinus ursinus, 515;
on the mane of Otaria jubata, 521;
on the pairing of seals, 523; on
sexual differences in the colour of
bats, 534.

S., on the habits of Hoplo-
pterus, 366; on the plumes of
herons, 391; on the vernal moult
of Herodias bubulcus, 393.
Alligator, courtship of the male, 221,
351; roaring of the male, 567.
Amadavat, pugnacity of male, 366.
Amadina Lathami, display of plumage
by the male, 402.

castanotis, display of plumage
by the male, 402.
Amazons, butterflies of the, 250;
fishes of the, 343.

America, variation in the skulls of
aborigines of, 26; wide range of
aborigines of, 169; lice of the
natives of, 170; general beardless-
ness of the natives of, 560.

North, butterflies of, 250;
Indians of, women a cause of strife
among the, 561; Indians of, their
notions of female beauty, 577,
580.

of, 29; native, variability of, 174;
and negroes, difference of, 197;
aversion of, to hair on the face, 580.
Ammophila, on the jaws of, 275.
Ammotragus tragelaphus, hairy fore-
legs of, 531, 533.

Amphibia, affinity of, to the ganoid
fishes, 159; vocal organs of the.
566.

Amphibians, 165, 348; breeding
whilst immature, 485

Amphioxus, 159.

Anatidæ, voices of, 374.

Anax junius, differences in the sexes
of, 290.

Andaman islanders, susceptible to
change of climate, 188.

Anderson, Dr., on the tail of Macacus
brunneus, 59; the Bufo sikimmen-
sis, 349; sounds of Echis carinata,
353.

Andræna fulva, 292.

Anglo-Saxons, estimation of the beard
among the, 581.

Animals, domesticated, more fertile
than wild, 45; cruelty of savages
to, 118; characters common
man and, 146; domestic, change of
breeds of, 596.

to

Annelida, 264; colours of, 265.
Anobium tessellatum, sounds produced
by, 306.

Anolis cristatellus, male, crest of, 354;
pugnacity of the male, 354; throat-
pouch of, 354.

Anser canadensis, 416.

cygnoides, 415; knob at the base
of the beak of, 426.

hyperboreus, whiteness of, 492
Antelope, prong-horned, horns of, 234

Antelopes, generally polygamous, 217;
horns of, 234, 504; canine teeth of
some male, 502; use of horns of
509; dorsal crests in, 550; dew-
laps of, 531; winter change of two
species of, 543; peculiar markings
of, 543.

Antennæ, furnished with cushions in
the male of Penthe, 276.

Anthidium manicatum, large male of,
273.

Anthocharis cardamines, 308, 312;
sexual difference of colour in, 322.
genutia, 312.
sara, 312.

Anthophora acervorum, large male of,

Anthropidæ, 152.

Anthus, moulting of, 392.
Antics of birds, 380.

Antigua, Dr. Nicholson's observations
on yellow fever in, 195.
Antilocapra americana, horns of, 234,
504, 507.

Antilope bezoartica, horned females of,
505, 506, 507; sexual difference in
the colour of, 535.

Dorcas and euchore, 504.
euchore, horns of, 509.

montana, rudimentary canines in
the young male of, 514.

niger, sing sing, caama, and gor-
gon, sexual differences in the colours
of, 536.

oreas, horns of, 234.

saiga, polygamous habits of, 217.
strepsiceros, horns of, 234.

subgutturosa, absence of sub-
orbital pits in, 529.
Antipathy, shewn by birds in confine-
ment, to certain persons, 411.
Ants, 147; large size of the cerebral
ganglia in, 54; soldier-, large jaws
of, 63; playing together, 69;
memory in, 74; intcommunication
of, by means of the antennæ, 89;
habits of, 147; difference of the
nexes in, 292; recognition of each
other by, after separation, 292.
White, habits of, 291.

Anura, 349.

Apat nia muliebris, male unknown,
254.

Apathus, difference of the sexes in,
292.

Apatura Iris, 307, 308.

Apes, difference of the young, froin
the aut, 8; semi-erect attitude of
some, 5. ; mastoid processes of, 53;
influences of the jaw-muscles on
the physiognomy of, 54; female
destitute of large canines, 63;
building platforms, 82; imitative
faculties of, 129; anthropomor-
phous, 153; probable speedy ex-
termination of the, 156; Gratiolet
on the evolution of, 177; canine
teeth of male, 502; females of
some, less hairy beneath than the
males, 601.

long-armed, their mode of prc-
gression, 52.

Aphasia, Dr. Bateman on, 88.
Apis mellifica, large male of, 279.
Apollo, Greek statues of, 581.
Apoplexy in Cebus Azaræ, 7.
Appendages, anal, of insects, 276.
Approbation, influence of the love of,
109, 116, 131.

Aprosmictus scapulatus, 457.
Aus, proportion of sexes, 255.
Aquatic birds, frequency of white
plumage in, 495.

Aquila chrysaetos, 408.

Arab women, elaborate and peculiar
coiffure of, 583.

Arabs, fertility of crosses with other
races, 171; gashing of cheeks and
temples among the, 574.
Arachnida, 272.

Arakhan, artificial widening of the
forenead by the natives of, 583.
Arboricola, young of, 468.
Archeopteryx, 158.

Arctiidæ, coloration of the, 314.
Ardea asha, rufescens, and cæruler,
change of colour in, 494, 495.

cærulea, breeding in immature
plumage, 484.

gularis, change of plumage in,

495.

herodias, love-gestures of the
male, 380.

ludoviciana, age of mature plu-
mage in, 483; continued growth
of crest and plumes in the male of
485.

nycticorax, cries of, 368.

Ardeola, young of, 468.
Ardetta, changes of plumage in, 461.
Argenteuil, 22.

Argus pheasant, 384, 403, 462; dis-
play of plumage by the male, 398;
ocellated spots of the, 428; grada-
tion of characters in the, 434.
Argyll, Duke of, on the physical
weakness of man, 63; the fashion-
ing of implements peculiar to man,
82; on the contest in man between
right and wrong, 125; on the pri-
mitive civilisation of man, 143; on
the plumage of the male Argus
pheasant, 398; on Urosticte Ben-
jamini, 442, 443; on the nests of
birds, 453.

Argynnis, colouring of the lower sur-
face of, 314.

Aricoris epitus, sexual differences in
the wings of, 277.
Aristocracy, increased beauty of the,
586.

Arms, proportions of, in soldiers and
sailors, 32; direction of the hair on
the, 151.

and hands, free use of, indi-
rectly correlated with diminution
of canines, 53.

Arrest of development, 35, 36.
Arrow-heads, stone, general resem-
blance of, 179.
Arrows, use of, 179.

Arteries, variations in the course of
the, 26.

Artery, effect of tying, upon the
lateral channels, 32.
Arthropoda, 265.

Arts practised by savages, 179.
Ascension, coloured incrustation on
the rocks of, 263.

Ascidia, affinity of the lancelet to,

159; tadpole-like larvæ of, 159.
Ascidians, 262; bright colours of
some, 260.

Asinus, Asiatic and African species of,
548.

Ateuchus, cicatricosus, habits of, 300.
Athalia, proportions of the sexes in,
254.

Atropus pulsatorius, 291.
Attention, manifestations of, in ani
mals, 73.

Audouin, V., on a hymenopterous pa-
rasite with a sedentary male, 221.
Audubon, J. J., on the pinioned goose,
105; on the speculum of Mergus
cucullatus, 236; on the pugnacity
of male birds, 362, 366; on Tetrao
cupido, 367; on Ardea nycticorac,
368; on Sturnella ludoviciana, 368:
on the vocal organs of Tetrao
cupido, 371; on the drumming of
the male Tetrao umbellus, 375; on
sounds produced by the nightjar,
376; on Ardea herodias and Cath-
artes jota, 380; on Mimus polj
glottus, 393; on display in male
birds, 394; on the spring change of
colour in some finches, 394; recog-
nition of a dog by a turkey, 412;
selection of mate by female birds,
416; on the turkey, 411, 412, 419;
on variation in the male scarlet
tanager, 424; on the musk-rat,
542; on the habits of Pyranja
æstiva, 453; on local differences in
the nests of the same species of
birds, 456; on the habits of wood-
peckers, 458; on Bombycila caro-
linensis, 461; on young females of
Tyranga æstiva acquiring male cha-
racters, 462; on the immature
plumage of thrushes, 464; on the
immature plumage of birds, 465 et
se.; on birds breeding in immature
plumage, 484; on the growth of
the crest and plumes in the male
Ardea ludoviciana, 485; on the
change of colour in some species of
Ardea, 494

Audubon and Bachman, M.M., on
squirrels fighting, 500; on the
Canadian lynx, 521.

Aughey, Prof., on rattlesnakes, 353.
Austen, N.L., on Anolis cristateltus,
354.

Australia, not the birthplace of man,
155; half-castes killed by the
natives of, 170; lice of the natives
of, 170; prevalence of female in
fanticide in, 592.

Australia, South, variation in the
skulls of aborigines of, 26.
Australians, colour of newborn chil-
dren of, 557; relative height of the
sexes of, 559; women a cause of
war among the, 561.

Axis deer, sexual difference in the
colour of the, 537.

Aymaras, measurements of the, 34;
no grey hair among the, 559;
hairlessness of the face in the, 561;
long hair of the, 580.
Azara, on the proportion of men and
women among the Guaranys, 244;
on Palamedea cornuta, 366; on the
beards of the Guaranys, 561; on
strife for women among the Guanas,
561; on infanticide, 577, 592; on
the eradication of the eyebrows and
eyelashes by the Indians of Para-
guay, 580; on polyandry among
the Guanas, 593; celibacy unknown
among the savages of South Ame-
rica, 594; on the freedom of
divorce among the Charruas, 598.

B.

Babbage, C., on the greater propertion
of illegitimate female births, 244.
Babirusa, tusks of the, 518.
Baboon, revenge in a, 69; rage ex-

cited in, by reading, 71; manifes-
tation of memory by a, 74; em-
ploying a mat for shelter against
the sun, 82; protected from punish-
ment by its companions, 103.

Cape, mane of the male, 521;
Hamadryas, mane of the male,
521.
Baboons, effects of intoxicating li-
quors on, 7; ears of, 15; diversity
of the mental faculties in, 27; hands
of, 50; habits of, 51; variability
of the tail in, 58; manifestation of
maternal affection by, 70; using
stones and sticks as weapons, 81;
co-operation of, 101; silence of, on
plundering expeditions, 104; ap-
parent polygamy of, 217; poly-
gamous and social habits of, 590.
Bachman, Dr., on the fertility of mu-
lattoes, 171.

Baer, K. E. von, on embryonic deve-
lopment, 9.

Bagehot, W., on the social virtue
among primitive men, 117; slavery
formerly beneficial, 117; on the
value of obedience, 130; on human
progress, 132; on the persistence
of savage tribes in classical times,
183.

Bailly, E. M., on the mode of fighting
of the Italian buffalo, 508; on the
fighting of stags, 510.

Bain, A., on the sense of duty, 98;
aid springing from sympathy, 103;
on the basis of sympathy, 106; on
love of approbation, &c., 109; on
the idea of beauty, 584.

Baird, W., on a difference in colour
between the males and females of

some Entozoa, 260.

Baker, Mr., observation on the pro-
portion of the sexes in pheasant-
chicks, 247.

Sir S., on the fondness of the
Arabs for discordant music, 380; on
sexual difference in the colours of
an antelope, 536; on the elephant
and rhinoceros attacking white or
grey horses, 540; on the disfigure-
ments practised by the negroes,
541; on the gashing of the cheeks
and temples practised in Arab
countries, 574; on the coiffure of
the North Africans, 575; on the
perforation of the lower lip by the
women of Latooka, 575; on the
distinctive characters of the coiffure
of central African tribes, 576; on
the coiffure of Arab women, 584.
"Balz" of the Black-cock, 363, 405.
Bantam, Sebright, 211, 238.
Banteng, horns of, 505; sexual dif-

ferences in the colours of the, 536.
Banyal, colour of the, 579.
Barbarism, primitive, of civilised
nations, 143.

Barbs, filamentous, of the feathers,
in certain birds, 385, 430.
Barrago, F., on the Simian rosem-
blances of man, 3.

Barr, Mr., on sexual preference in
dogs, 524.

Barrington, Daines, on the language
of birds, 86; on the clucking of
the hen, 368; on the object of the
song of birds, 369; on the singing
of female birds, 370; on bird