. Evolution and animal life; an elementary discussion of facts, processes, laws and theories relating to the life and evolution of animals . FIG. 279.—Skulls of man and the orang-utan: 1, skull of a seven-year-old Germanchild; 2, skull of an Australian from Murray River; 3, skull of young orang-utan;4, skull of a grown orang-utan. (After Wiedersheim; one-sixth natural size.) from it, with a different origin, a different motive, a differentdestiny. Man is like the other species, an inhabitant of the earth,a product of the laws of life; his characters are phases in thelong process of change and
. Evolution and animal life; an elementary discussion of facts, processes, laws and theories relating to the life and evolution of animals . FIG. 279.—Skulls of man and the orang-utan: 1, skull of a seven-year-old Germanchild; 2, skull of an Australian from Murray River; 3, skull of young orang-utan;4, skull of a grown orang-utan. (After Wiedersheim; one-sixth natural size.) from it, with a different origin, a different motive, a differentdestiny. Man is like the other species, an inhabitant of the earth,a product of the laws of life; his characters are phases in thelong process of change and adaptation to which all organismsare subject. From the point of view7 of zoology, the humanrace is a group of closely allied species, or subspecies, undoubted- MAXS PLACE IX NATURE 453. FIG. 280.—Young chimpanzee. (From Welt-all u. Menschheit; after photograph fromlife by Dr. Heck of Berlin.) ly derived from a commonstock, and each species inits ramifications modifiedby the forces and condi-tions included under thegeneral heads of variation,heredity, segregation, selec-tion, and the impact ofenvironment precisely asspecies in other groups areaffected. It is clear that ifthere is an origin of speciesthrough natural causesamong the lower animalsand plants, there is anorigin of species amongmen. If homology amonganimals and plants is thestamp of blood relation-ship, the same rule holdswith man as well. Man is connected with the lower animalsby the most perfect of homologies. These are traceable inevery bone and muscle, in every blood vessel and gland, in every phase of structure,even including those ofthe brain and nervoussystem. The commonheredity of man with othervertebrate animals is aswell established as any factin phylogeny can be. In working out thedetails of th
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