FIGURE 101 



101 Sclienia of venous plexuses of left side in lower cervical region of cat embryo 

 between 13 nun. and 14 mm. crown-niinp measure in transverse section. 



1 Sym]jathetic nerve. 



8 Oesophagus. 



9 Trachea. 



16 Dorso medial somatic venous tributaries. 



17 Prevertebral venous plexus. 



18 Peritracheal venous plexus. 



19 >Su])rathymic venous plexus. 



20 .Subth\miic venous ])lexus. 



21 Th\-nuis. 



22 Vagus. 



23 Ijcft carotid arterj'. 



24 Thyrocervical artery. 

 2(i ( 'oninion jugular \'ein. 



