PLATE 1 



EXPLANATION OF FIGURES 



31 Lateral view of a reconstruction of a part of the archenteron of an Acanthias 

 embryo 6.4 mm. long (S.C. 19). X 100. 



32 Anterior view of the reconstruction seen in figure 31. X 100. 



33 Lateral view of a reconstruction of the hepatic region of an Acanthias 

 embryo 7.5 mm. long (H.E.C. 1503). X 75. 



34 Anterior view of the reconstruction seen in figure 33. 



35 Ventral view of a reconstruction of the hepatic region of an Acanthias 

 embryo 9 mm. long (H.E.C. 1495). X 75. 



36 Anterior view of the reconstruction seen in figure 35. X 75. 



37 Ventral view of a reconstruction of the hepatic region of an Acanthias 

 embryo 7.5 mm. long (S.C. 15). X 75. 



38 Anterior view of the reconstruction seen in figure 37. X 75. 



B.en., blastodermic entoderm 



D.cyst., cystic duct 



F.g., fore gut 



G.bl., gall bladder 



He-p.d., hepatic diverticulum 



L.hep.p., lateral hepatic pouch 

 M.hep.p., median hepatic pouch 

 T.a., anlagen of hepatic tubules 

 Y.S., anterior wall of yolk stalk 



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