[195] Revista Sperimentale, xxii.
[196] Human Embryology, p. 468.
[197] American Naturalist, 1883.
[198] Oral Deformities, p. 480.
[199] Medicine, September, 1897.
[200] For cases see, e.g., Gould’s Anomalies.
[201] Bland Sutton, Evolution and Disease, p. 193.
[202] Osseous Deformities, p. 398.
[203] Journal of Morphology, vol. v.
[204] Arb. Zoolog. Institut, Wurzburg, iii.