1. Jean Rostand, Les Origines de la biologie experimentale et l'Abb� Spallanzani (Paris, 1951), p. 183. Similar opinions are expressed in the following works: F. R. Lillie, ?The History of the Fertilization Problem,? Science 43 (January 1916), 42. R. C. Punnett, ?Ovists and animalculists,? Amer. Nat., 62 (1928), 507. Jacques Roger, Les Sciences de la vie dans la pens�e Fran�aise du XVIII si�cle (Paris, Armand, Colin, 1963), p. 731. E. B. Wilson, The Cell in Development and Heredity (Macmillan, 1925), p. 8.
2. Leclercde Buffon, Histoire naturelle des animaux, XVII, 310, in the C. S. Sonnine edition of Histoires naturelles (Paris, F. Dufart, 1800).
3. Lazaro Spallanzani, Opuscolo II: Osservazioni e Sperienze intorno ai Vermicelli Spermatici dell'Uomo e degli Animali, in the Classici Italiani series 2, (Milano, 1826), 103, 332, 338.
4. L. Spallanzani, Dissertations Relative to the Natural History of Animals and Vegetables, vol. II, pt. 1, a dissertation concerning animal generation (London, 1789; English trans.) p. 11. Spallanzani is referring to a statement made by Menzius in his Generatio in rana.
5. This statement of Linnaeus was cited by E. Guy�not, Les Sciences de la vie aux XVII et XVIII si�cles (Albin Michel, 1941), p. 282.