The geographical distribution of animals, with a study of the relations ...
The geographical distribution of animals, with a study of the relations ... The geographical distribution of animals, with a study of the relations ...
CHAPTEE I.INTRODUCTORY.It is a fact within the experience of most persons, that thevarious species of animals arenot uniformly dispersed over thesurface of the country. If we have a tolerable acquaintancewith any district, be it a parish, acounty, or a larger extent ofterritory, we soon become aware that each well-marked portionof it has some peculiarities in its animal productions. If wewant to find certain birds or certain insects, we have not only tochoose the right season but to go to the right place. If wetravel beyond our district in various directions we shall almostcertainly meet with something new to us ; some species whichwe were accustomed to see almost daily will disappear, others'which we have never seen before will make their appearance.If we go very far, so as to be able to measure our journey bydegrees of latitude and longitude and to perceive importantchanges of climate and vegetation, the differences in the forms ofanimal life will become greater ;till at length we shall come to acountry where almost everything will be new, all the familiarcreatures of our own districtless differing from them.If we have been observantbeing replaced by others more orduring our several journeys, andhave combined and compared the facts we have collected, it willbecome apparent that the change we have witnessed has beenof two distinct kinds.In our own and immediately surroundingdistricts, particular species appeared and disappeared because
- Page 2: Boston UniversityCollege of Liberal
- Page 10 and 11: Till. WOULD „» M Km 'ATI IK'S I'
- Page 12 and 13: 1IvWNrf*^ • '-^Taircecollection V
- Page 14 and 15: viPREFACE.past history of the earth
- Page 16 and 17: —viiiPREFACE.distribution of an o
- Page 18 and 19: PREFACE.therefore designed a series
- Page 20 and 21: xiiPREFACE.and conclusions would ha
- Page 22 and 23: ::::—::xivPREFACE.Professor Flowe
- Page 25 and 26: 2—CONTENTS OF THE EIEST VOLUME.PA
- Page 27 and 28: —CONTENTS OF THE FIRST VOLUME.xix
- Page 29: —CONTENTS OF THE FIRST VOLUME.xxi
- Page 33: THEGEOGRAPHICAL DISTRIBUTIONOF ANIM
- Page 37 and 38: chap, i.] INTRODUCTORY.Having thus
- Page 39 and 40: chap, i.] INTRODUCTORY.slow process
- Page 41 and 42: 3chap, i.] INTRODUCTORY. 9Two subje
- Page 43 and 44: chap, ii.] DISPERSAL AND MIGRATION.
- Page 45 and 46: ;chap, ii.] DISPERSAL AND MIGRATION
- Page 47 and 48: ;chap, ii.] DISPERSAL AND MIGRATION
- Page 49 and 50: chap, ii.] BIRDS. 17return along th
- Page 51 and 52: ;chap. 11.] BIRDS. 19immediately co
- Page 53 and 54: chap, ii.] BIRDS. 21We see, then, t
- Page 55 and 56: ;;chap, ii.] BIRDS. 23India and Chi
- Page 57 and 58: 4chap, ii.] BIRDS. 25the time of th
- Page 59 and 60: chap, ii.] BIRDS. 27preceding sprin
- Page 61 and 62: chap. II.] REPTILES AND FISHES. 29T
- Page 63 and 64: chap, ii.] LAND-SHELLS AND INSECTS.
- Page 65 and 66: ;chap, ii.] DISPERSAL AND MIGRATION
- Page 67 and 68: -CHAPTEK III.DISTRIBUTION AS AFFECT
- Page 69 and 70: chap, in.] CONDITIONS AFFECTING DIS
- Page 71 and 72: chap, m.] CONDITIONS AFFECTING DIST
- Page 73 and 74: 5;chap, in.] CONDITIONS AFFECTING D
- Page 75 and 76: chap, ill.] CONDITIONS AFFECTING DI
- Page 77 and 78: chap, in.] CONDITIONS AFFECTING DIS
- Page 79 and 80: chap, in.] CONDITIONS AFFECTING DIS
- Page 81 and 82: chap, in.] CONDITIONS AFFECTING DIS
- Page 83 and 84: chap, iv.] ZOOLOGICAL KEGIONS. 51or
CHAPTEE I.INTRODUCTORY.It is a fact <strong>with</strong>in <strong>the</strong> experience <strong>of</strong> most persons, that <strong>the</strong>various species <strong>of</strong> <strong>animals</strong> arenot uniformly dispersed over <strong>the</strong>surface <strong>of</strong> <strong>the</strong> country. If we have a tolerable acquaintance<strong>with</strong> any district, be it a parish, acounty, or a larger extent <strong>of</strong>territory, we soon become aware that each well-marked portion<strong>of</strong> it has some peculiarities in its animal productions. If wewant to find certain birds or certain insects, we have not only tochoose <strong>the</strong> right season but to go to <strong>the</strong> right place. If wetravel beyond our district in various directions we shall almostcertainly meet <strong>with</strong> something new to us ; some species whichwe were accustomed to see almost daily will disappear, o<strong>the</strong>rs'which we have never seen before will make <strong>the</strong>ir appearance.If we go very far, so as to be able to measure our journey bydegrees <strong>of</strong> latitude and longitude and to perceive importantchanges <strong>of</strong> climate and vegetation, <strong>the</strong> differences in <strong>the</strong> forms <strong>of</strong>animal life will become greater ;till at length we shall come to acountry where almost everything will be new, all <strong>the</strong> familiarcreatures <strong>of</strong> our own districtless differing from <strong>the</strong>m.If we have been observantbeing replaced by o<strong>the</strong>rs more orduring our several journeys, andhave combined and compared <strong>the</strong> facts we have collected, it willbecome apparent that <strong>the</strong> change we have witnessed has been<strong>of</strong> two distinct kinds.In our own and immediately surroundingdistricts, particular species appeared and disappeared because
Change language