106 



THE DEVELOPMENT OF THE CHICK 





pr.str. 



■■■■■■ -V:- & 





imicr-^:::-- :■■■■■ ■ 



m-im^^---':^ :■■■:•: 



V.o.m. 



Fig. 61. — Embryo of 9 s from above drawn 

 as a transparent object with transmitted 

 light. X 30. 

 Abbreviations same as before; in addi- 

 tion: H. B., Hind brain. M. B., Mid brain, 

 n. S., Neural suture. 



