Identifier: evolutionanimall00jord (find matches)
Title: Evolution and animal life; an elementary discussion of facts, processes, laws and theories relating to the life and evolution of animals
Year: 1907 (1900s)
Authors: Jordan, David Starr, 1851-1931 Kellogg, Vernon L. (Vernon Lyman), 1867-1937
Subjects: Evolution
Publisher: New York, D. Appleton and Company
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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over this vast area,and the recognition of North America as a separate (nearctic)realm, which some writers have attempted, seems hardlynecessary. Alfred Russell Wallace refers to this unity of northern lifein these words: When an Englishman travels on the nearest sea route from GreatBritain to Northern Japan, he passes countries very unlike his ownboth in aspect and in natural productions. The sunny isles of theMediterranean, the sands and date palms of Egypt, the arid rocks ofAden, the cocoa groves of Ceylon, the tiger-haunted jungles of Malaccaand Singapore, the fertile plains and volcanic peaks of Luzon, theforest-clad mountains of Formosa, the bare hills of China pass suc-cessively in review, until after a circuitous journey of thirteen thousand 320 EVOLUTION AND ANIMAL LIFE miles, he finds himself at Hakodate, in Japan. He is now separatedfrom his starting point by an almost endless succession of plains andmountains, arid deserts or icy plateaus; yet, when he visits the interior
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FIG. 187.—Three species of jack rabbits differing in size, color, and markings, but be-lieved to be derived from one stock. The differences have arisen through isolationand adaptation. The upper figure shows the head and fore legs of the black jackrabbit, Lepus insulariis, of Espiritu Sanctu Island, Gulf of California; the lowerright-hand figure the Arizona jack rabbit, Lepus alleni, specimen from Fort Lowell,Arizona; and the lower left-hand figure the San Pedro Martin jack rabbit, Lepusmartirensis, from San Pedro Martin, Baja California. GEOGRAPHICAL DISTRIBUTION 321 of the country, he sees so many familiar natural objects that he canhardly help fancying he is close to his home. He finds the woods andfields tenanted by tits, hedge sparrows, wrens, wagtails, larks, red-breasts, thrushes, buntings, and house sparrows; some absolutelyidentical with our own feathered friends, others so closely resemblingthem that it requires a practised ornithologist to tell the difference.. . . There

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