VERTE

Rongess |. er. IT, p. 1322-1342, 1927.

+ — Œnothera cytology in relation to genetics. Amer. Nat. LXII, p. 97-114, 1928.

TADLER (L. J.). — Mutations in Barley induced by X rays-

and radium. Science, N. S., LXVIIT, p. 186- 187, 1928.

STARK (M. B.). (1). — An tn tumor in the fruit fly,

Drosophila. Jour. Cancer Research, III, p. 279-300, 1918.

(2). — A benign tumor that is hereditary in Drosophila. Proc. nat. Acad, Sc., NV, p. 573-580, 1919.

- STERN (C.) (1). — Vererbung im Y-Chromoscm ven Droso-

phila melanogaster. Biol. Zentralb., XLNI, p. 344-348, 1926.

(2). — Ein genetischer und cytologischer Beweis für. Vererbung im Y-Chromosom von Dr. melanogaster. Zeits. ind. Abst. Vererb., XLIV, p. 187-231, 1927.

STEVENS (N. M.). — A study of the germ cells of certain

Diptera, with reference t: heter chr m:s més ant the phe-

nomena ot synapsis. Jour, exp. Zool.. V.p. 359-374. 1908. Sromp$ (T. J.). (1). — Mutati n bei Œrotiera biennis. Biol.

Centralb., XXXII, p. 521-535. 1912.

(2). — Uber die Mutationserscheinungen der Œnothera biennis. Verh. V. int. Kongres. f. Vererb., II, 1405-1414,

| STROMAN (G N.). — An a bino Coycte. Jour. Hcredity, XVI

Drosophila ampelophila. Science, N. S., XXXVII, p. 990,