Spinal c/angl/o 



Notochord 



Ext branch 

 n.accessorrus 



Epiglottis 

 J ranch arch 3 



Branch arch? 



Mandible 



Olfactory pit %'""" 



Spinal cord 



Intjuqular 



vein 



N. hypoglossus 



Gang, nodos. 

 n. 10 



Pharyngeal 

 pouch 3 



Aortic arch 3 

 Thyreoid anlage. 



epithelium 



.^SSS^SSSi^^- 



Fig. 126. — Transverse section through the third pharyngeal pouches of a 10 mm. pig embryo. X 



Spinal, qanq. 



R.desc. aorta 



Spinal cord 



L.desc aorta, 

 Intjuou/ar 



Pharynx -? m j » v SlI WW ^, 



N-Vaaus *$£££ <J^^\ Pouch 4 



vein 

 uyngeal 



Tracheal groove 

 R. atrium 

 Aorta 



•xA'j ill*- 



Mr-~Lcifr/u/n 



Put 



ter 



ri cardial 

 xr/ty 



.ventricle 



monary artery 



r?. ventricle 



Fig. 127. — Transverse section through the fourth pharyngeal pouches of a 10 mm. pig embryo. X 22.5. 



136 



