PLATE 30 



EXPLANATION OF FIGURE 



Fig. 40 Photomicrograph of a transverse section of a 7.5 mm. embryo of Amia 

 calva, taken through the independent anlage of the medial pharyngeal lymphatic 

 (4') which does not communicate with the precardinal vein (6), nor does it con- 

 nect with the latter bj'^ means of solid endothelial strand. P. E. C. 459, slide 1, 

 section 76. 



REFERENCES 



4', Independent anlage of the medial 6, Precardinal or jugular vein 

 pharyngeal lymphatic in Amia 27, Root of dorsal aorta 



134 



