106 



THE DEVELOPMENT OF THE CHICK 



-5.9 



FIG. 61. Embryo of 9 s from above drawn 

 as a transparent object with transmitted 

 light, x 30. 



-~ ~ ^^ ^ ^tiwie; in addi- 

 n U q' S' B -' 1 Hmd brain. M. B., Mid brain, 

 n. te., JNeiiral suture. 



/!> 



