

:. Sabin. 



i (in about fifty-five minutes), similar ones 



thi-m which have i'n. > ions with them, thus forming 



ter. The new om-s are lot ati i parti; <m either side of the first 



ami partly BuperficiaJ to them. Their Injection now show- • tiny 



•a hat like bunches of grapes, connected, as wer< 



. with ilii-saiiir ii ■ Dtal % .in.-. an- still separate 



from one another. 



14. — Afti r Miller. Diagram from an reconstruction of the veins and 

 of tii. cervical and upper thoracic regions of a chick embryo 13.5 



mm. Ion;-', after 5 'lavs and 10 hours of incubation: ri.uht side. 1. Pra?- 



cardinal vein. 2. Post-cardinal vein. 3. Duct of Cuvier. i. Intersegmental 

 5. Lateral group of vascular Islands and veno-lymphatlc 



vessels. 9. Spinal (cervical) nerves. 9a Brachial plexus. Aft< r Miller, 



Amer. Jour of Anat, 1912, Vol. 12, Bg, 12. 



