Amphibia, affinity of, to the ganoid fishes; vocal organs of the.
Amphibians, breeding whilst immature.
Amphioxus.
Amphipoda, males sexually mature while young.
Amunoph III., negro character of, features of.
Anal appendages of insects.
Analogous variation in the plumage of birds.
Anas.
Anas acuta, male plumage of.
Anas boschas, male plumage of.
Anas histrionica.
Anas punctata.
Anastomus oscitans, sexes and young of; white nuptial plumage of.
Anatidae, voices of.
Anax junius, differences in the sexes of.
Andaman islanders, susceptible to change of climate.
Anderson, Dr., on the tail of Macacus brunneus; the Bufo sikimmensis; sounds of Echis carinata.
Andreana fulva.
Anglo-Saxons, estimation of the beard among the.
Animals, domesticated, more fertile than wild; cruelty of savages to; characters common to man and; domestic, change of breeds of.
Annelida, colours of.
Anobium tessellatum, sounds produced by.
Anolis cristatellus, male, crest of; pugnacity of the male; throat-pouch of.
Anser canadensis.
Anset cygnoides; knob at the base of the beak of.
Anser hyperboreus, whiteness of.
Antelope, prong-horned, horns of.
Antelopes, generally polygamous; horns of; canine teeth of some male; use of horns of; dorsal crests in; dewlaps of; winter change of two species of; peculiar markings of.
Antennae, furnished with cushions in the male of Penthe.
Anthidium manicatum, large male of.
Anthocharis cardamines; sexual difference of colour in.
Anthocharis genutia.
Anthocharis sara.
Anthophora acervorum, large male of.
Anthophora retusa, difference of the sexes in.
Anthropidae.
Anthus, moulting of.
Antics of birds.
Antigua, Dr. Nicholson's observations on yellow fever in.
Antilocapra americana, horns of.
Antilope bezoartica, horned females of; sexual difference in the colour of.
Antilope Dorcas and euchore.
Antilope euchore, horns of.
Antilope montana, rudimentary canines in the young male of.
Antilope niger, sing-sing, caama, and gorgon, sexual differences in the colours of.
Antilope oreas, horns of.
Antilope saiga, polygamous habits of.
Antilope strepsiceros, horns of.
Antilope subgutturosa, absence of suborbital pits in.
Antipathy, shewn by birds in confinement, to certain persons.
Ants, large size of the cerebral ganglia in; soldier, large jaws of; playing together; memory in; intercommunication of, by means of the antennae; habits of; difference of the sexes in; recognition of each other by, after separation.
Ants White, habits of.
Anura.
Apatania muliebris, male unknown.
Apathus, difference of the sexes in.
Apatura Iris.
Apes, difference of the young, from the adult; semi-erect attitude of some; mastoid processes of; influences of the jaw-muscles on the physiognomy of; female, destitute of large canines; building platforms; imitative faculties of; anthropomorphous; probable speedy extermination of the; Gratiolet on the evolution of; canine teeth of male; females of some, less hairy beneath than the males.
Apes, long-armed, their mode of progression.
Aphasia, Dr. Bateman on.
Apis mellifica, large male of.
Apollo, Greek statues of.
Apoplexy in Cebus Azarae.
Appendages, anal, of insects.
Approbation, influence of the love of.
Aprosmictus scapulatus.
Apus, proportion of sexes.
Aquatic birds, frequency of white plumage in.
Aquila chrysaetos.
Arab women, elaborate and peculiar coiffure of.
Arabs, fertility of crosses with other races; gashing of cheeks and temples among the.
Arachnida.
Arakhan, artificial widening of the forehead by the natives of.
Arboricola, young of.
Archeopteryx.
Arctiidae, coloration of the.
Ardea asha, rufescens, and coerulea, change of colour in.
Ardea coerulea, breeding in immature plumage.
Ardea gularis, change of plumage in.
Ardea herodias, love-gestures of the male.
Ardea ludoviciana, age of mature plumage in; continued growth of crest and plumes in the male of.