1912_g_. A modification of the sex-ratio and of other ratios through linkage. Z. f. ind. Abs. u. Veterb. 1912. 1914a. Another case of multiple allelomorphs in _Drosophila_. Biol. Bull. 26, p. 231, Apr. 1914. 1914b. Two sex-linked lethal factors in _Drosophila_ and their influence on the sex-ratio. Jour. Exp. Zool., 17, p. 81, July 1914. 1914c. A third sex-linked lethal factor in _Drosophila_. Jour. Exp. Zool., 17, p. 315, Oct. 1914. 1914d. Sex-limited and sex-linked inheritance. Am. Nat., 48, P. 577, Oct. 1914. 1915a. The infertility of rudimentary-winged females of _Drosophila_. Am. Nat., 49, p. 40, Apr. 1915. 1915b. The role of the environment in the realization of a sex-linked Mendelian character in _Drosophila_. Am. Nat., 49, p. 385, July 1915. {86} MORGAN, T. H., and C. B. BRIDGES. 1913. Dilution effects and bicolorism in certain eye-colors of _Drosophila_. Jour. Exp. Zool., 15, p. 429, Nov. 1913. MORGAN, T. H., and ELETH CATTELL. 1912. Data for the study of sex-linked inheritance in _Drosophila_. Jour. Exp. Zool., July, 1912. 1913. Additional data for the study of sex-linked inheritance in _Drosophila_. Jour. Exp. Zool., Jan. 1913. MORGAN, T. H., and H. PLOUGH. 1915. The appearance of known mutations in other mutant stocks. Am. Nat., 49, p. 318, May 1915. MORGAN, STURTEVANT, MULLER, and BRIDGES. The mechanism of Mendelian heredity. Henry Holt & Co., 1915. MORGAN, T. H., and S. C. TICE. 1914. The influence of the environment on the size of the expected classes. Biol. Bull., 26, p. 213, Apr. 1914. RAWLS, ELIZABETH. 1913. Sex-ratios in _Drosophila ampelophila_. Biol. Bull. 24, p. 115, Jan. 1913. SAFIR, S. R. 1913. A new eye-color mutation in _Drosophila_ and its mode of inheritance. Biol. Bull. 25, p. 47, June 1913. STARK, M. B. 1915. The occurrence of lethal factors in inbred and wild stocks of DROSOPHILA. Jour. Exp. Zool., 19, p. 531-538. Nov. 1915. STURTEVANT, A. H. 1913. The linear arrangement of six sex-linked factors in _Drosophila_ as shown by their mode of association. Jour. Exp. Zool., Jan. 1913. 1915. The behavior of the chromosomes as studied through linkage. Z. f. Ind. Abs. u. Vereb. 1915. TICE, S. C. 1914. A new sex-linked character in _Drosophila_. Biol. Bull., Apr., 1914. WHITING, P. W. 1913. Viability and coupling in _Drosophila_. Am. Nat., 47, p. 508, Aug. 1913. * * * * * DESCRIPTIONS OF PLATES. PLATE I. FIG. 1. Normal [female]. FIG. 2. Sable [female]. FIG. 3. Lemon [male]. FIG. 4. Abnormal abdomen [female]. FIG. 5. Abnormal abdomen [female]. FIG. 6. Yellow [female]. PLATE II. FIG. 7. Eosin, miniature, black [male]. FIG. 8. Eosin, miniature, black [female]. FIG. 9. Cherry. FIG. 10. Vermilion. FIG. 11. White. FIG. 12. Bar (from above).