330 



af 



ao \ 



* 



stz_ 





1 , 



-rf 



B. 



THE MAMMALIAN EMBRYO, 

 Fig. 106. 



1\ 



[chap. 



ir "P- 



-A.a 



'\, 



ill' 



ii'ii*'*" 



Embryo Rabbits of about Nine Days fkom the Dorsal Side. 



(From KoUiker.] 



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



ap. area pellucida ; rf. medullary groove ; h'. medullary plate in 

 the region of the future fore-brain ; h". medullary plate in 

 the region of the future mid-brain ; vh. fore-brain ; ab. optic 

 vesicle ; mh. mid-brain ; hh. and h'". hind-brain ; uw. meso- 

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

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

 vein ; af. amnion fold. 



