330 



A. 



THE MAMMALIAN EMBRYO. 



Fig. 106. 



B. 



[chap. 







ki 



V; 





I '■/ 



l\ 



-^^„r -/'7I 



■MaSj3iJ^" 



*PiMSSj4»»&^'^ 



Embryo Babbits of about Nine Days from the Doesal Side. 



(From Kolliker.] 



A. magnified 22 times, and B. 21 times. 



op. area pellucida ; rf. medullary groove ; W. medullary plate in 

 the region of the future fore-brain ; A", medullary plate in 

 the region of the future mid-brain ; vh. fore-brain ; ah. optio 

 vesicle ; mh. mid-brain ; hli. and A'", hiad-brain ; uv>. meso- 

 blastio somite ; stz. vertebral zone ; pz. lateral zone ; hz. and 

 A. heart ; ph. pericardial section of body-cavity ; vo. vitelline 

 vein ; af. amnion fold. 



