CONGDON 



PLATE 1 



-carotid artery 



jorhcarch 



.' 



- . 

 Precursor of right Z ^aortic arch 



Lett paired aorta f> recursor O fteff3^aorhc arch 



Arhrh : 

 paired aorta 



a i red aorta 

 Endothelium of ventrical i 



Origin of ventral branch 



iothetium ofatnalca. . 



.. , ?/ oovch 



<JU,a.29 



! J 



Aorta 



R&L primitive internal ' caroha 'arteries 



L eft earlier mandibular artery 

 I Rod 2&aorf,c arch 

 ' ' R*L3*-aorhcarch 

 I RudimentofL 4 'aorhc arch 

 -.<, arch 



I I Precursor of left pulmonary arch 



Precursor ct right pulmonaryarch 



Lett pnmihve internal caroha . 

 earlier mandr 



ynqeat ' p< 



' 



? udimenfoi 'he arch 



qeal complex 



of let f 



I -^ .<-' L>Giredaorfa 



% #* 



,r^ ^ | ' T qhtpa>' edoo' ta 



-Aorta 



: 



oortc 

 X 



" ' ventneuk 



JUa31 



J*xa32 



J. F. Didusch fee. 



A. Hoen & Co. Lith. 



