170 



THE AMERICAN NATURALIST [Vol. XLV 



"unit characters" controlling conditions of a more and 

 a less numerous production of melanic granules, which 

 conditions conform more or less closely to an alternative 

 mode of inheritance. 



LITERATURE CITED 



Abel, J., and Davis, W. '96. The Pigments of the Negro 's Skin and 

 Hair. Jour. Exp. Med., Vol. I, p. 361. 



Aeby, C. '85. Die Herkunft des Pigmentes im Epithel. Centralblatt 

 fiir die median i.s<h<„ H i^cmchoftcn, 23, S. 273. 



Bateson, W. '09. Mendel's Principles of Heredity. < ambridge, Uni- 

 versity Press. 



Brown, W. H. '10. Changes in the Hemosiderin Content of the Rab- 

 bit 's Liver during Autolysis. Jour. Exp. Med., Vol. 12, No. 5, p. 623. 



Chittenden, R. EL, and Albro, Alice H. '99. Formation of Melanins 

 or Melanin-like Pigments from Proteid Substances. Amer. Jour. 

 Phys., II, p. 291. 



Davenport, Gertrude ('. ami Charles B. '07. Heredity of Eye-color in 



Man. Science, n. s., 26, p. 289. 

 '09. Heredity of Hair Color in Man. Am. Nat., Vol. 43, No. 508, 



p. 193. 



'10. Heredity of Skin Pigmentation in Man. Am. Nat., Vol. 44, No. 



7. Ehrmann, S. '86. Untersuchungen iiber die Physiologie und Pathol- 

 ogie des Hautpigmentes. V krtcljahr.s.schrifl fiir DrrmatoUxjie und 

 Syphilis, Wien, 1885, N. F., 12, S. 507. 



tumeurs du cheval. Compt. ,;„<!. bill.. T. 136, p. 1086. 

 ■-9. Gortner, R, A. '10. Spiegler'a "White Melanin" as related to Dom- 

 inant or Recessive White. Am. Nat., Vol. 44, No. 524, p. 497. 

 . Holmes, S. J., and Loomis, H. M. '09. The Heredity of Eye Color and 



Hair Color in Man. Biol. Bull., Vol. 18, No. 1, p. 50. 

 . Karg. '88. Studien iiber transplantirte Haut. Arch. Anal. u. Entwkl, 



Anat. Abth., T. 20, S. 369. 

 . Meirowsky, E. '08. Ueber den Ursprung des melanotischen Pigments 



der Haut und des Auges. Leipzig. 

 Riddle, O. '09. Our Knowledge of Melanin Color Formation and its 



Bearings on the Men.lelian Description of Heredity. Biol. Bull, Vol. 



16, No. 6, p. 316. 



. Riehl, G. '84. Zur Kenntniss des Pigmentes im menschli.-hen Itaar. 



