FIGURES 89, 90 AXI) 91 



89 Reconstruction of caudal end of left jugular lynijih sac, wit h thoracic duct 

 approach, in a 13.5 nun. cat enil)ryo (series 1S9. slide \'ll. sections 1 to .')0), X 225. 

 Dor.sal view. 



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

 approach, in a 15 mm. cat embryo iseries245, slide XI, sections 1 to 44), X 225. 

 Dorsal view . 



91 Reconstruction of caudal end of left juiiular lympli sac with thoracic duct 

 approach, in a 17 mm. cat embryo (series 142, slide X. sections 1 to2.S, slide XI. 

 sections 1 to 29J, X 225. Dorsal \iew. 



1 Sympalhet ic nerxc. 

 7 Aorta. 



12 Jugidar l\-mi)li sac. thoraeic (hict api)r()aeh. 



13 Jugular lymph sac, jugular approach. 



14 .lugular lymph sac, subclavian api)roach. 

 16- to Dorso-medial somatic venous tributaries. 



(Suj). intercosl.al v. ) 



17 I'revertebr.al \ctioiis ])le\us. 



21 Thymus. 



22 Vagus. 



23 Left carotid .irtery. 



24 Thyr()cer\icnl artei-\'. 



25 Internal jugular \-ein. 



26 Common jugular \<'in. 

 29 Jugulo-subclaviaii trunk, 



31 Pi-imi1i\'e ulnar xcno-lymphat ic. 



33 Left subclavian artery. 



33' Left subcl.'ivian \-eiii. 



35 'riioi'acic duel , |)reaz\g(>s scguieiit . 



41 N'ertebral arl<'ry. 



42 Vertebral vein, 



45 Innominate arterw 



46 Left superidi' intercDslal xcin. 



54 Fifth spin.al nerxc 



55 .Sixth, seventh and eighth spinal ner\'e. 



