GENETICS: R. GOLDSCHMIDT 
53 
The complete paper describing these results and discussing them 
further will shortly be published elsewhere. 
1 Pearl and Surface, /. BioL Chem., 19, 263-278 (1914); and Ibid., 21, 95-101 (1915). 
2 Pearl, R., J. BioL Chem. (in press, 1916). 
3 Gudernatsch, J. F., Arch. Entw.-Mech., 35, 457 (1912); also Amer. J. AnaL, 15,431- 
478 (1914). 
A PRELIMINARY REPORT ON FURTHER EXPERIMENTS IN 
INHERITANCE AND DETERMINATION OF SEX 
By Richard Goldschmidt 
(Of the Kaiser Wilhelm Institut fiir Biologic, Berlin) 
OSBORN ZOOLOGICAL LABORATORY, YALE UNIVERSITY 
Received by the Academy, November 29, 1915 
In two former papers^ the interesting 'gynandromorphism* produced 
by crossing the European and the Japanese races of the gipsy-moth 
(Lymantria dispar) was described and an experimental analysis of the 
phenomenon was attempted. From the data obtained important con- 
clusions on the sex-problem in general were drawn. Although the main 
points seemed to be clear, a series of questions still remained open. One 
of them was, that the (apparently) same kind of crosses did not give 
the same results, if the material used had a different origin. It could 
be regarded as practically certain that the chief result, viz., the appear- 
ance of gynandromorphism in certain crosses found its right explanation 
in the hypothesis of a quantitatively different behavior or a different 
potency of the male sex-factors in the different races. Some of the 
experiments led me to suspect that this potency varied with the geo- 
graphical distribution of the moth. Therefore it was one of my aims 
during a sojourn in Japan, to study the behavior of different local forms 
in that country in various crosses inter se and with different European 
forms.2 These experiments are in no way to be regarded as completed, 
but the results so far obtained are so interesting and seem to bring the 
definitive solution of the problem so near, that a preliminary report on 
a part of them may be made. 
A few words are first needed about the terminology. In previous 
papers I have used the term of gynandromorphism to indicate the sex- 
ual abnormalities produced in the racial crosses of these moths. It 
seems, however, no longer advisable to use this term, as it is applied more 
or less generally to quite a different phenomenon, i.e., to individuals 
showing a mosaic of the characters of both sexes. In such a gynandro- 
morph — see for example Boveri's late analysis of the Eugster bees^ — 
a given organ or complex of cells is either male or female. But this 
