PLATE 11 



EXPLANATION OF FIGURE 



12 Reconstruction showing the junction of the azygos and pre-azygos 

 segments of the thoracic duct in a 23 mm. Tragulus embryo. Collection No. 

 228. X 100. 23, arch of aorta; 24, aorta; 28, azygos segment of the thoracic 

 duct; 30, cephalic division of the pre-azygos segment of the thoracic duct; 31, 

 caudal division of the pre-azygos segment of the thoracic duct; 30-31, confluence 

 of the two divisions of the pre-azygos segment of the thoracic duct; 50, junction 

 of the azygos and pre-azygos segments of the thoracic duct. 



242 



