PLATE 10 



EXPLANATION OF FIGURE 



Fig. 12 Ventral view of the arteries, veins and lymphatics found on the left 

 side of the head and pharynx in a 10 mm. embryo of Amia calva; semi-diagram- 

 matic. P. E. C. 447. 



REFERENCES 



1, Subocular lymph sac 



2, Medial pharyngeal communication; 

 the point at which the medial pharyn- 

 geal lymphatic communicates with 

 the precardinal vein 



3'", Independent anlagen of the lat- 

 eral pharyngeal lymphatic 

 4, Medial pharyngeal lymphatic 

 6, Precardinal or jugular vein 



11, Postcardinal vein 



12, Duct of Cuvier 



14, Dorsal aorta 



15, Hyoidean artery 



21, Superficial facial lymphatic 

 29, Temporary connection established 

 between the subocular lymph sac 

 and the veins in the embryos of 

 Amia and Lepidosteus 



94 



