FIGURES 89, 90 AND 91 



89 Reconstruction of caudal end of left jugular lymph sac, with thoracic duct 

 approach, in a 13.5 mm. cat embryo (series 189, slide VII, sections 1 to 50), X 225. 

 Dorsal view. 



90 Reconstruccion of caudal end of left jugular lymph sac, with thoracic duct 

 approach, in a 15 mm. cat embryo (series 245, slide XI, sections 1 to 44), X 225. 

 Dorsal view. 



91 Reconstruction of caudal end of left jugular lymph sac with thoracic duct 

 approach, in a 17 mm. cat embryo (series 142, slide X, sections 1 to 28, slide XI ; 

 sections 1 to 29), X 225. Dorsal view. 



1 Sympathetic nerve. 

 7 Aorta. 



12 Jugular lymph sac, thoracic duct approach. 



13 Jugular lymph sac, jugular approach. 



14 Jugular lymph sac, subclavian approach. 

 16-46 Dorso-medial somatic venous tributaries. 



(Sup. intercostal v.) 



17 Prevertebral venous plexus. 



21 Thymus. 



22 Vagus. 



23 Left carotid artery. 



24 Thyrocervical artery. 



25 Internal jugular vein. 



26 Common jugular vein. 

 29 Jugulo-subclavian trunk. 



31 Primitive ulnar veno-lymphatic. 



33 Left subclavian artery. 



33' Left subclavian vein. 



35 Thoracic duct, preazygos segment. 



41 Vertebral artery. 



42 Vertebral vein. 



45 Innominate artery. 



46 Left superior intercostal vein. 



54 Fifth spinal nerve. 



55 Sixth, seventh and eighth spinal nerve. 



