PLATE 7 



EXPLANATION OF FIGURES 



49 Anterior view of the reconstruction shown in figures 47 and 48. X 75. 



50 Anterior view of a reconstruction of the gall bladder and liver ducts of an 

 Acanthias embryo 20.6 mm. long (H.E.C. 1494). X 75. 



D.chol., ductus choledochus 



D.cysL, cystic duct 



D.hcp.l., left hepatic duct 



D.hep.r., right hepatic duct 



G.bl., gall bladder 



T.a.l., anterior left hepatic ramus or 



tubule group 

 T.a.r., anterior right ramus or tubule 



group 

 T.p.L, dorsal cluster, posterior left 



tubule group, which later forms the 



posterior left ramus 



T.d.r., dorsal cluster, posterior right 



tubule group 

 T.l.m., left medial ramus or tubule 



group 

 T.r.m., right medial ramus or tubule 



group 

 T.V.I., minor tubules of ventral left 



tubule group 

 T.v.r., minor tubules of ventral right 



tubule group 



404 



