284 GERM-CELL CYCLE IN ANIMALS 
the male germ-cell cycle, especially in mammals, 
mollusks, and insects, and appear to be continuous 
from one generation of cells to the next. During 
Fic. 79.— Behavior of the mitochondria during the fertilization and 
early cleavage of the egg of Ascaris. A. Egg into which a sperma- 
tozoén has penetrated. B, C. The mixing of the mitochondria of 
the egg and spermatozoén. D. Division stage of the first two blas- 
tomeres. (After Meves, 1911 and 1914.) 
mitosis the plastosomes lie outside of the spindle 
(Fig. 79, D); they may divide autonomously as 
claimed by Fauré-Frémiet (1910) in Protozoa (Fig. 
