248 T. H. Morgan 
one, so that eight single and two double chromosomes are present, 
or two entire chromosomes are given off into the male polar body. 
On the former alternative we should expect to find two chromo- 
y ~~ Wie (SNS \ 
Fig. IV Chromosomes of somatic cells of male embryos. 
somes twice as large as the rest if the larger rather than the smaller 
chromosomes are involved, but such is not the case. In the other 
species I shall bring forward evidence to show that two}whole 
° <\¢)) : 
“a Rh? Se t) Py 
a = Cc D 
3,3 Ce a «2% 
@e° i; Ry 2 
E E (e H 
@ ‘qe 
eae SF 
I ¥ cs be: 
Fig. V Chromosomes of spermatogonial cells of male. 
chromosomes are in fact sent out into the polar body at the time 
when all the others divide. 
