260 



GERM-CELL CYCLE IN ANIMALS 



i-yp' 



<a.eits 



A 





•*:?% 



• ••• 



C 



Ly^aetts" ^ 



•• 



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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.) 



