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*MARSHALL, A. MILNES. "Lectures on the Darwinian 

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MARSHALL, F. H. A. "The Physiology of Reproduction." 

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*METCALF. "Outline of the Theory of Organic Evolution." 

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**MORGAN, C. LLOYD. "Habit and Instinct." 1896. [The 

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MORGAN, T. H." Evolution and Adaptation." 1903. [An 

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PACKARD, A. S. "Lamarck, his Life and Work." 1901. [A 

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**PEARSON, KARL. "The Grammar of Science." 2nd 

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PERRIER, E. " Philosophic zoologique avant Darwin." 1884. 

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*PLATE, L. " Selektionsprinzip und Probleme der Artbildung. 

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