662 



TEXTBOOK OF ZOOLOGY 



Cerebrum 



Trachea 



--Lung of- 

 cavity B 



Bronchi 



Lung of 

 '1 I \ : i w<fv;--.--:v.i:-.^x {.•:■•■ .•••.•:7i cavityA 



\.A Median 



V \ sy« / i 



\ Medulla / 

 Cerebelium 



Fig. 360. — Left, dorsoposterior view of brain from pig embryo with double body 

 and single head. Right, larynx, tracheae, and lungs of pig embryo with double 

 trunk. (After Fitzpatrick.) 



Trunk from other heart 

 R. sabdovian- 



Panetalj-. 



Dorsal 

 aorta 



R. carotid 

 --L. carotid 

 ■L. subclavian 



Ductus 

 arteriosus 



Porietals 



AUantoic- 

 (/ef t back) 



Renal 

 —Utero- ovarian 



^-External iliac 



^Allantoic / left^ 



r J , ^bacK>' 

 Caudal 



Fig. 361. — Dorsal aortae and branches in embryo pig which had a single head and 



two bodies. (After Fitzpatrick.) 



