PLATP] IS 



EXPLANATION" OF FIGURES 



77 Section through the heart of the same embryo (see fig. 76) showing the 

 solidity of the proximal portion of the heart and the almost complete absence of 

 anterior vessels. 



78 Section tangential to the posterior surfaces of the eyes showing the absence 

 of endothelium posterior to the groups of erythrocytes seen in figure 76. 



79 Section through the nasal sensory epithelia of the same embryo showing 

 a group of erythrocytes in an endothelial cavity near the sensilla of the left side. 



80 Section through the liver of this same embryo showing erythrocytes 

 within the liver tissue and their absence in the aorta. 



ABBREVIATIONS 



Erth., erythrocytes Lvr., liver 



Ht., heart Nas. ep., nasal epithelium 



166 



