266 
GERM-CELL CYCLE IN ANIMALS 
1910). The eggs laid by the stem-mother (see Chap- 
ter 
Fia. 
I, p. 24) in the spring possess four ordinary and 
A B 
F 
71.— Stages in the spermatogenesis and odgenesis of the honeybee. 
A, B. First maturation division in the male. C. Second matura- 
tion division in the male. Three cells are produced: the first (RKi) 
without chromatin; the second (RK:2) with chromatin, but small 
and functionless; and the third a functional spermatid. (After 
Meves, 1907.) 
D. First maturation division in the female showing polar body 
with eight dyads, and secondary odcyte with eight dyads. FE. Sec- 
ond maturation division in the female showing the divided first 
polar body, the second polar body, and female pronucleus each with 
eight monads. F. Outer end of first polar body disintegrating ; 
inner half of first polar body uniting with second polar body, and 
female pronucleus. (After Nachsheim, 1913.) 
two sex chromosomes. These eggs give rise to 
parthenogenetic females with the same number of 
