Franklin P. Mall 267 
That the unit arranged around the hepatic vein was finally accepted as 
the lobule is largely due to excessive amount of connective tissue along 
Fic. 29. Ventral view of a wax model of the embryo, 24 mm. long (No. 6) 
x 10. Uv, umbilical vein; @b, gall bladder. 
Fic. 30. Superior view of the same liver. 
the portal twigs in the pig’s liver, a condition almost peculiar to this 
animal. Had the liver of Phoca been studied in the place of that of the 
