[4] Out of 12 pupae treated 8 died and of the 4 survivors, one only was affected. See M. v. Linden, Archiv. Rassen. u. Gesells., 1904, I.
[5] For illustrations see Oberthur's Études d'Entom., 1896, where many of these curious aberrations are represented; also Barrett, Lepid. Brit. Islands, II, pp. 71 and 72.
[6] Schübeler, F. C., Die Culturpflanzen Norwegens, 1862, especially pp. 24 and 28.
[7] I am obliged to him and to Dr. E. Gold for much trouble taken to answer my questions. Some idea of the kind of weather indicated by an average of 2.76° C. above the mean may be got from a comparison with the year 1911, which most people will remember as one of the hottest summers they have known. The July of that year was in east and southeast England about 4° F. above the mean but 2.67 C. means about 4.8° F. above the mean. At Greenwich July, 1859, was about 6.5° F. above the average.
[8] Wille, N., Biol. Cbltt., XXV, 1905, p. 521.
[9] Wettstein, R. von. Der Neo-marckismus u. seine Beziehungen zum Darwinismus, Jena, 1903.
[10] T. Graham Brown, Proc. Roy. Soc., 1912, vol. 84, B, p. 555. This paper gives full reference to the previous literature of the subject.
[11] Morgan, T. H., Evolution and Adaptation, New York, 1903.
[12] Kammerer's chief paper on this subject is in Arch. f. Entwm., 1909, XXVIII, p. 447, and it is to this that the paginal references in the present text relate. His previous paper appeared, ibid., 1906, XXII, p. 48. An account of his further experiments with Alytes is given in Natur, 1909-10, Heft 6, p. 95.
[13] In reply to my letter Dr. Kammerer who was then away from home very kindly replied that he was not quite sure whether he had killed specimens of Alytes with "Brunftschwielen" or whether he only had living males of the fourth generation, but that he would send illustrative material.