HUMAN EMBRYO OF THIRTEEN SOMITES 



325 



Fig. 3 Graphic reconstruction representing tiie embryo cut in the mid-sagit- 

 tal plane. The brokeTi circle above the letter H represents the position of the 

 trigeminal ganglion. X 100. 



A, Atrium Cl.M, Cloacal membrane L, Liver anlage 



Al., AUantois F, Forebrain M, Mid-brain 



ALA, Allantoic artery FG, Foregut P, Pharynx 



Al.V , Allantoic vein //, Hind-brain Th, Thyreoid 



BC, Bulbus cordis HG, Hind-gut V, Ventricle 



/, Infundibulum 



