396 



FREDERIC T. LEWIS 



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Figs. 8 and 9 Transverse sections of pig embryos of *10 to 12' mm. X 75 diam. 

 F. /., gallbladder. F. p., portal vein.- F. mot., umbilical vein. For other abbre- 

 viations, see figs 4 to 7. 



"essentially like that of the gall bladder and its duct." Thus 

 the cases suggest an extreme subdivision of the gall bladder 

 and hepatic diverticulum ; but Miller is doubtless correct in cor- 

 relating them with embryonic conditions in the pancreas. He 

 considers that they are degenerate left lobes of the ventral pan- 

 creas, terminating in cysts, and having little or no pancreatic 

 tissue along their ducts. 



When the left lobe tends to encircle the intestine, instead of 

 extending into the ventral mesentery, it gives rise to a very differ- 

 ent anomaly — the annular pancreas. It may fairly be said that 

 the embryo shown in fig. 8 already possesses such a pancreas. 



