260 GERM-CELL CYCLE IN ANIMALS 



o* 





A. 



3 



Ly^aeitS' ^ 



J!? 



Fig. 66. — Maturation in Lygoeus. Male above. Female below. Let- 

 tering as in Fig. 65. (From Morgan s Heredity and Sex, published 

 . by the Columbia University Press.) 



