476 



Anatomy and Development of V^cins of Chelonia 



and then divides into three large branches. One of these branches con- 

 tinues forward just under the skin on the dorsal surface of the neck. It 

 receives a number of branches from the muscles of the neck, and an 

 anastomosing branch from the internal jugular, then divides and enters 

 the skull to open into the occipital sinus. The other two branches pass 



EXTERNAL 

 — JUGULAR 



— \\ VERTEBRAL \ 



BRACHIAL 

 _ SUBCLAVIAN 



INTERNAL JUGULAR 

 SINUS VENOSUS 



PORTAL OF BOJANUS 

 GASTRIC VEIN 



MESENTERIC PORTAL 



L. ABDOMINAL 



^ RENAL 



ADVEHENT 



CIRCUMFLEX 



ILIAC 



LATERAL CLOACAL 



LATERAL COCCYGEAL 

 SUPERIOR COCCYGEAL 



Fig. 10. Diagram showing the larger body veins of Kinosternon pennsyl- 

 vanicum. Ventral view. 



around parallel to the anterior border of the shell and open into the 

 external jugular of each side. Caudally they give off branches to the 

 dorsal surface of the kidneys, as well as the large branch to the ventral 

 surface. 



The posterior renal advehent veins or the hypogastric veins of Bo- 

 janus, 19, arise from a number of small veins from the inner and hinder 



