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Alfred Binet Amixia animals apogamy arise artificial selection associated average breeding cause closely allied species Cloth common areas condition cross-infertility crossing Darwin Delbceuf discriminate isolation distinction divergence of character divergence of type divergent evolution E. A. Wallis Budge effects of intercrossing essay fact favour flowers form of homogamy form of isolation free intercrossing genera geographical isolation groups Gulick heredity hybrids importance indiscriminate infertility insect visits inter logical modification monotypic and polytypic monotypic evolution Moritz Wagner mutual sterility Nageli natural selection number of individuals occur organic evolution origin of species paper parent form Paul Carus peculiarity physio physiological change physiological isolation physiological selection pollen polytypic evolution prepotency present principle Prof regard reproductive system result segregation selective fertility separated sexual specific characters specific differentiation specific divergence specific type supposed swamping effects synoical theory of natural theory of physiological tion Transl variability variations varieties Wagner Wallace Wallace's Weismann
Page 145 - ... that I attribute the modification of species exclusively to natural selection, I may be permitted to remark that in the first edition of this work, and subsequently, I placed in a most conspicuous position— namely, at the close of the Introduction — the following words: "I am convinced that natural selection has been the main but not the exclusive means of modification.
Page 185 - Cloth, 1. oo net. (5s.) 217. KARMA, A STORY OF EARLY BUDDHISM. Paul Carus. Illustrated. Crepe paper, tied in silk. 75c. (3s. 6d.) 2170. KARMA, Eine buddhistische Erzahlung. Paul Carus. Illustrated. 35c.
Page 89 - Composita? exist, and there can be no doubt that if the pollen of all these species could be simultaneously or successively placed on the stigma of any one species, this one would elect with unerring certainty its own pollen.
Page 186 - BABEL AND BIBLE. Two Lectures on the Significance of Assyriological Research for Religion, Embodying the most important Criticisms and the Author's Replies.
Page 101 - ... some changes in the external conditions. This will justly sound very hypothetical. I cannot give my reasons in detail ; but the most general conclusion, which the geographical distribution of all organic beings, appears to me to indicate, is that isolation is the chief concomitant or cause of the appearance of new forms (I well know there are some staring exceptions).
Page 187 - Britan, Ph. D. Cloth, 75c net, mailed 85c. DE VRIES, HUGO. 332. SPECIES AND VARIETIES, THEIR ORIGIN BY MUTATION. Prof. Hugo de Vries. Edited by DT MacDougal.
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