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30 A Study of the Structural Unit of the Liver 
lobule of Theile as the true unit of the liver, which in Phoca * is outlined 
by a capsule as the hepatic lobule is in the pig. The biliary or portal 
lobule has been used as a basis by Berdal* in his histology and has been 
Fic. 1. Diagram of a transverse section of a group of lobules with lines 
indicating the course of the capillaries. The lobules as usually understood 
are marked with circles. P, a portal unit; n, nodal point; p’ a portal unit 
outlined as in partial congestion. a. 
advocated by myself for a long time.’ Recently it has been discussed as 
the secreting lobule by J. B. MacCallum °, and has been defended from 
an embryological standpoint by F. T. Lewis.’ 
’ Brissaund et Sabourin, Compt. rend., Soc. de biol., XL, 1888. 
* Berdal, Eléments d’histologie normale, Paris, 1894. 
5 Mall, Zeit. f. Morph. u. Anthropol., II, 1900. 
® MacCallum, J. B., English translation of Scymonowicz’s Histology. 
7 Lewis, F. T., Anat. Anz., XXV, 1904. 
