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- Abbe Prevost - MANON LESCAUT
- Alcott, Louisa M. - LITTLE MEN
- Alcott, Louisa M. - LITTLE WOMEN
- Alcott, Louisa May - JACK AND JILL
- Austen, Jane - EMMA
- Austen, Jane - MANSFIELD PARK
- Austen, Jane - NORTHANGER ABBEY
- Austen, Jane - PERSUASION
- Austen, Jane - PRIDE AND PREJUDICE
- Austen, Jane - SENSE AND SENSIBILITY
- Ballantyne, R. B. - THE CORAL ISLAND
- Balzac, Honore de - EUGENIE GRANDET
- Balzac, Honore de - FATHER GORIOT
- Baroness Orczy - THE SCARLET PIMPERNEL
- Barrie, James M. - PETER PAN
- Blackmore, R. D. - LORNA DOONE
- Boccaccio, Giovanni - DECAMERONE
- Bronte, Charlotte - JANE EYRE
- Bronte, Emily - WUTHERING HEIGHTS
- Buchan, John - PRESTER JOHN
- Buchan, John - THE THIRTY-NINE STEPS
- Bunyan, John - THE PILGRIM'S PROGRESS
- Burnett, Frances H. - A LITTLE PRINCESS
- Burnett, Frances H. - LITTLE LORD FAUNTLEROY
- Burnett, Frances H. - THE SECRET GARDEN
- Butler, Samuel - EREWHON
- Carroll, Lewis - ALICE IN WONDERLAND
- Carroll, Lewis - THROUGH THE LOOKING-GLASS
- Chaucer, Geoffrey - THE CANTERBURY TALES
- Chesterton, G. K. - A SHORT HISTORY OF ENGLAND
- Chesterton, G. K. - THE INNOCENCE OF FATHER BROWN
- Chesterton, G. K. - THE MAN WHO KNEW TOO MUCH
- Chesterton, G. K. - THE MAN WHO WAS THURSDAY
- Chesterton, G. K. - THE WISDOM OF FATHER BROWN
- Childers, Erskine - THE RIDDLE OF THE SANDS
- Christie, Agatha - THE MYSTERIOUSAFFAIR AT STYLES
- Christie, Agatha - THE SECRET ADVERSARY
- Collins, Wilkie - THE MOONSTONE
- Collodi, Carlo - THE ADVENTURES OF PINOCCHIO
- Conan Doyle, Arthur - A STUDY IN SCARLET
- Conan Doyle, Arthur - MEMOIRS OF SHERLOCK HOLMES
- Conan Doyle, Arthur - THE ADVENTURES OF SHERLOCK HOLMES
- Conan Doyle, Arthur - THE HOUND OF THE BASKERVILLES
- Conan Doyle, Arthur - THE SIGN OF THE FOUR
- Conrad, Joseph - HEART OF DARKNESS
- Conrad, Joseph - LORD JIM
- Conrad, Joseph - NOSTROMO
- Conrad, Joseph - THE NIGGER OF THE NARCISSUS
- Conrad, Joseph - TYPHOON
- Darwin, Charles - THE AUTOBIOGRAPHY OF CHARLES DARWIN
- Darwin, Charles - THE ORIGIN OF SPECIES
- Defoe, Daniel - MOLL FLANDERS
- Defoe, Daniel - ROBINSON CRUSOE
- Dickens, Charles - A CHRISTMAS CAROL
- Dickens, Charles - A TALE OF TWO CITIES
- Dickens, Charles - BLEAK HOUSE
- Dickens, Charles - DAVID COPPERFIELD
- Dickens, Charles - GREAT EXPECTATIONS
- Dickens, Charles - HARD TIMES
- Dickens, Charles - LITTLE DORRIT
- Dickens, Charles - MARTIN CHUZZLEWIT
- Dickens, Charles - OLIVER TWIST
- Dickens, Charles - PICTURES FROM ITALY
- Dickens, Charles - THE MYSTERY OF EDWIN DROOD
- Dickens, Charles - THE PICKWICK PAPERS
- Dostoevsky, Fyodor - CRIME AND PUNISHMENT
- Dostoyevsky, Fyodor - THE BROTHERS KARAMAZOV
- Du Maurier, George - TRILBY
- Dumas, Alexandre - THE COUNT OF MONTE CRISTO
- Dumas, Alexandre - THE MAN IN THE IRON MASK
- Dumas, Alexandre - THE THREE MUSKETEERS
- Eliot, George - ADAM BEDE
- Eliot, George - DANIEL DERONDA
- Eliot, George - MIDDLEMARCH
- Eliot, George - SILAS MARNER
- Eliot, George - THE MILL ON THE FLOSS
- Equiano - AUTOBIOGRAPHY
- Esopo - FABLES
- Fenimore Cooper, James - THE LAST OF THE MOHICANS
- Fielding, Henry - TOM JONES
- Flaubert, Gustave - MADAME BOVARY
- Frank Baum, L. - THE WONDERFUL WIZARD OF OZ
- Frazer, James George - THE GOLDEN BOUGH
- Freud, Sigmund - DREAM PSYCHOLOGY
- Galsworthy, John - THE FORSYTE SAGA
- Gilbert and Sullivan - PLAYS
- Gogol - DEAD SOULS
- Goldsmith, Oliver - SHE STOOPS TO CONQUER
- Goldsmith, Oliver - THE VICAR OF WAKEFIELD
- Grahame, Kenneth - THE WIND IN THE WILLOWS
- Hardy, Thomas - FAR FROM THE MADDING CROWD
- Hardy, Thomas - JUDE THE OBSCURE
- Hardy, Thomas - TESS OF THE D'URBERVILLES
- Hardy, Thomas - THE MAYOR OF CASTERBRIDGE
- Hawthorne, Nathaniel - THE SCARLET LETTER
- Hobbes, Thomas - LEVIATHAN
- Hope, Anthony - THE PRISONER OF ZENDA
- Hornung, E. W. - MR. JUSTICE RAFFLES
- Ibsen, Henrik - AN ENEMY OF THE PEOPLE
- Ibsen, Henrik - CASA DI BAMBOLA
- Ibsen, Henrik - GHOSTS
- Ibsen, Henrik - HEDDA GABLER
- Ibsen, Henrik - JOHN GABRIEL BORKMAN
- Ibsen, Henrik - PILLARS OF SOCIETY
- Ibsen, Henrik - ROSMERHOLM
- Ibsen, Henrik - THE LADY FROM THE SEA
- Ibsen, Henrik - THE MASTER BUILDER
- Ibsen, Henrik - WHEN WE DEAD AWAKEN
- Irving, Washington - THE LEGEND OF SLEEPY HOLLOW
- James, Henry - ITALIAN HOURS
- James, Henry - THE BOSTONIANS
- James, Henry - THE PORTRAIT OF A LADY
- James, Henry - THE TURN OF THE SCREW
- James, Henry - WASHINGTON SQUARE
- Jerome, Jerome K. - THREE MEN IN A BOAT
- Jerome, Jerome K. - THREE MEN ON THE BUMMEL
- Jonson, Ben - THE ALCHEMIST
- Jonson, Ben - VOLPONE
- Joyce, James - A PORTRAIT OF THE ARTIST AS A YOUNG MAN
- Joyce, James - DUBLINERS
- Joyce, James - ULYSSES
- Kingsley, Charles - THE WATER-BABIES
- Kipling, Rudyard - CAPTAINS COURAGEOUS
- Kipling, Rudyard - INDIAN TALES
- Kipling, Rudyard - JUST SO STORIES
- Kipling, Rudyard - KIM
- Kipling, Rudyard - THE JUNGLE BOOK
- Kipling, Rudyard - THE MAN WHO WOULD BE KING
- Kipling, Rudyard - THE SECOND JUNGLE BOOK
- Lawrence, D. H - THE RAINBOW
- Lawrence, D. H - THE WHITE PEACOCK
- Lawrence, D. H - TWILIGHT IN ITALY
- Lawrence, D. H. - SONS AND LOVERS
- Lawrence, D. H. - WOMEN IN LOVE
- Lear, Edward - BOOK OF NONSENSE
- Lear, Edward - LAUGHABLE LYRICS
- Lear, Edward - MORE NONSENSE
- Lear, Edward - NONSENSE SONG
- London, Jack - MARTIN EDEN
- London, Jack - THE CALL OF THE WILD
- London, Jack - WHITE FANG
- Malthus, Thomas - PRINCIPLE OF POPULATION
- Marryat, Captain - THE CHILDREN OF THE NEW FOREST
- Marx, Karl - THE COMMUNIST MANIFESTO
- Mary, Charles and - TALES FROM SHAKESPEARE
- Melville, Hermann - MOBY DICK
- Melville, Hermann - TYPEE
- Mrs. Beeton - THE BOOK OF HOUSEHOLD MANAGEMENT
- Nesbit, E. - FIVE CHILDREN AND IT
- Nesbit, E. - THE PHOENIX AND THE CARPET
- Nesbit, E. - THE RAILWAY CHILDREN
- Nesbit, E. - THE STORY OF THE AMULET
- Pascal, Blaise - PENSEES
- Pellico, Silvio - LE MIE PRIGIONI
- Poe, Edgar A. - THE FALL OF THE HOUSE OF USHER
- Richardson, Samuel - PAMELA
- Rider Haggard, H. - ALLAN QUATERMAIN
- Rider Haggard, H. - KING SOLOMON'S MINES
- Schopenhauer, Arthur - THE ART OF CONTROVERSY
- Scott, Walter - IVANHOE
- Scott, Walter - QUENTIN DURWARD
- Scott, Walter - ROB ROY
- Scott, Walter - THE BRIDE OF LAMMERMOOR
- Scott, Walter - WAVERLEY
- Sewell, Anna - BLACK BEAUTY
- Shelley, Mary - FRANKENSTEIN
- Sheridan, Richard B. - THE SCHOOL FOR SCANDAL
- Sienkiewicz, Henryk - QUO VADIS
- Sterne, Laurence - A SENTIMENTAL JOURNEY
- Sterne, Laurence - TRISTRAM SHANDY
- Stevenson, Robert Louis - KIDNAPPED
- Stevenson, Robert Louis - THE BLACK ARROW
- Stevenson, Robert Louis - THE MASTER OF BALLANTRAE
- Stevenson, Robert Louis - THE STRANGE CASE OF DR. JEKYLL AND MR. HYDE
- Stevenson, Robert Louis - TREASURE ISLAND
- Stoker, Bram - DRACULA
- Strindberg, August - LUCKY PEHR
- Strindberg, August - MASTER OLOF
- Strindberg, August - THE RED ROOM
- Strindberg, August - THE ROAD TO DAMASCUS
- Strindberg, August - THERE ARE CRIMES AND CRIMES
- Swift, Jonathan - A MODEST PROPOSAL
- Swift, Jonathan - A TALE OF A TUB
- Swift, Jonathan - GULLIVER'S TRAVELS
- Thackeray, William - BARRY LYNDON
- Thackeray, William - VANITY FAIR
- Tolstoi, Lev - WAR AND PEACE
- Tolstoy, Leo - ANNA KARENINA
- Tolstoy, Leo - WAR AND PEACE
- Trollope, Anthony - BARCHESTER TOWERS
- Trollope, Anthony - THE WARDEN
- Twain, Mark - THE ADVENTURES OF HUCKLEBERRY FINN
- Twain, Mark - THE ADVENTURES OF TOM SAWYER
- Twain, Mark - THE PRINCE AND THE PAUPER
- Verne, Jules - 20000 LEAGUES UNDER THE SEAS
- Verne, Jules - A JOURNEY TO THE CENTRE OF THE EARTH
- Verne, Jules - ALL AROUND THE MOON
- Verne, Jules - AROUND THE WORLD IN 80 DAYS
- Verne, Jules - FIVE WEEKS IN A BALLOON
- Verne, Jules - MICHAEL STROGOFF
- Verne, Jules - THE MYSTERIOUS ISLAND
- Wallace, Edgar - SANDERS OF THE RIVER
- Wallace, Edgar - THE DAFFODIL MYSTERY
- Wallace, Lew - BEN HUR
- Wells, H. G. - KIPPS
- Wells, H. G. - THE INVISIBLE MAN
- Wells, H. G. - THE WAR OF THE WORLDS
- Wilde, Oscar - A WOMAN OF NO IMPORTANCE
- Wilde, Oscar - AN IDEAL HUSBAND
- Wilde, Oscar - DE PROFUNDIS
- Wilde, Oscar - LADY WINDERMERE'S FAN
- Wilde, Oscar - THE CANTERVILLE GHOST
- Wilde, Oscar - THE HAPPY PRINCE AND OTHER TALES
- Wilde, Oscar - THE IMPORTANCE OF BEING EARNEST
- Wilde, Oscar - THE PICTURE OF DORIAN GREY
- Woolf, Virgina - THE VOYAGE OUT
- Woolf, Virgina - NIGHT AND DAY
- Woolf, Virginia - LA STANZA DI JACOB
- Woolf, Virginia - MONDAY OR TUESDAY
- Yeats, William Butler - THE COUNTESS CATHLEEN
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<<< - >>> are now varying and increasing; for if this had been so, it would have
been fatal to my theory; inasmuch as geology plainly tells us that small
genera have in the lapse of time often increased greatly in size;
and that large genera have often come to their maxima, declined, and
disappeared. All that we want to show is, that where many species of a
genus have been formed, on an average many are still forming; and this
certainly holds good.
MANY OF THE SPECIES INCLUDED WITHIN THE LARGER GENERA RESEMBLE VARIETIES
IN BEING VERY CLOSELY, BUT UNEQUALLY, RELATED TO EACH OTHER, AND IN
HAVING RESTRICTED RANGES.
There are other relations between the species of large genera and their
recorded varieties which deserve notice. We have seen that there is no
infallible criterion by which to distinguish species and well-marked
varieties; and when intermediate links have not been found between
doubtful forms, naturalists are compelled to come to a determination by
the amount of difference between them, judging by analogy whether or not
the amount suffices to raise one or both to the rank of species. Hence
the amount of difference is one very important criterion in settling
whether two forms should be ranked as species or varieties. Now Fries
has remarked in regard to plants, and Westwood in regard to insects,
that in large genera the amount of difference between the species is
often exceedingly small. I have endeavoured to test this numerically by
averages, and, as far as my imperfect results go, they confirm the view.
I have also consulted some sagacious and experienced observers,
and, after deliberation, they concur in this view. In this respect,
therefore, the species of the larger genera resemble varieties, more
than do the species of the smaller genera. Or the case may be put in
another way, and it may be said, that in the larger genera, in which a
number of varieties or incipient species greater than the average are
now manufacturing, many of the species already manufactured still to a
certain extent resemble varieties, for they differ from each other by a
less than the usual amount of difference.
Moreover, the species of the larger genera are related to each other, in
the same manner as the varieties of any one species are related to
each other. No naturalist pretends that all the species of a genus are
equally distinct from each other; they may generally be divided into
sub-genera, or sections, or lesser groups. As Fries has well remarked,
little groups of species are generally clustered like satellites around
other species. And what are varieties but groups of forms, unequally
related to each other, and clustered round certain forms--that is, round
their parent-species. Undoubtedly there is one most important point of
difference between varieties and species, namely, that the amount of
difference between varieties, when compared with each other or with
their parent-species, is much less than that between the species of the
same genus. But when we come to discuss the principle, as I call it, of
divergence of character, we shall see how this may be explained, and
how the lesser differences between varieties tend to increase into the
<<< - >>>
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