128 



EARLY EMBRYOLOGY OF THE CHICK 



ganglion VII-VH1 

 auditory vesicle 



ganglion V 



myelocoele 



anterior cardinal vein 



branch of 



int. carotid a. 



mesocoele 



branch of 

 ant. cardinal v. 

 metacoele 



aortic arch II 

 aortic arch III 



pharynx 



int. carotid a. 



ant. cardinal v. 

 mesocoele 



notochord 



dorsal aorta 

 ant. cardinal v 



pharyngeal pouch 



visceral cleft II 



visceral arch III 



visceral cleft I 



mandibular arch 

 hyomandibular cleft 

 hyoid arch 



pericardial region of coelom 



trachea 

 oesophagus 



ventral body wall 



mesocoele 



optic stalk 



sensory layer of retina 

 pigment layer of retina 



lens 



bulbo-conus arteriosus 



sinus venosus 

 right duct of Cuvier 



posterior 

 cardinal v. 



lung bud 



olfactory pit 



tclocoelc 



D 



diocoele 



pleural region 



of coelom left duct 

 of Cuvier 



ventricle pericardial region of coelom 



FIG. 46 



