PLATE 5 



EXPLANATION OF FIGURES 



40 to 42 Portions of thick sections of livers of Acanthias embryos of dif- 

 ferent ages. The method of preparation is described in footnote 4, page 225. 

 All approximately X 200. 



40 Thick section of the liver of an embryo approximately 15 mm. long. 



41 Thick section of the liver of an embryo approximately 21 mm. long. 



42 Thick section of the liver of an embryo approximately 30 mm. long. 



310 



