The Ampulla of Vater. 123 



THE AMPULLA OF VATER AND THE PANCREATIC 

 DUCTS IN THE DOMESTIC CAT {Felis domestica).'' 



BY SIMON H. GAGE, B. S. 



{Received December ip, iSyS.) 



As with nearly all organs, the pancreas and its ducts were first 

 carefully investigated in man, therefore, it is necessary to turn 

 to the history of human anatomy for the first exact knowledge 

 upon the subject of this paper. 



Anatomists attribute to G. Wirsung the discovery, in 1642-3, 

 of a pancreatic duct in man, opening into the duodenum with 

 the ductus choledochus (37 and i, 383).! 



Vesling, in 1664 (35 and 22, 509), and DeGraaf again in 167 1, 



DESCRIPTION OF PLATE XII. 



All the figures original except III. 



Fig. I, Natural size, from an adult female cat, seen from the ventral surface. 

 The great omentum, the jejunum, ileum, colon, and liver removed; the remain- 

 ing parts shown in situ. The duct of Wirsung was afterwards injected with 

 Berlin-blue, and both it and the duct of Santorini dissected out to show their 

 branches and anastomoses. 



1. Pyloric region of the stomach. 



2. Pylorus. 2-3. The duodenum. 



4. Gastro-splenic division of the pancreas, near the main branch of the duct 

 of Wirsung. 



5. The duodenal part of the pancreas and branch of the duct of Wirsung. 



6. Duodenum at the point where the duct of Santorini pierces its walls. The 

 dotted line shows the extent of the pancreas on the dorsal side of the intestine. 

 The duct of Santorini is seen to anastomose with each division of the duct of 

 Wirsung. 



7. Ductus communis choledochus. 



8. The point where the ductus choledochus and duct of Wirsung enter the 

 duodenum. 



9. Tip of the spleen, somewhat displaced. 



10. The superior mesenteric artery sending the inferior pancreatlco-duodenal 

 branch to those parts. 



11. Superior mesenteric vein receiving a corresponding branch. 



Fig. II. Natural size, from an adult female cat. The liver turned to the 

 right bringing the concave side up, the duodenum to the left, so that its right 

 side looks directly upward, and then sliced oif to the level of the ampulla of 



*This paper is based upon investigations made in course of the preparation of a Manual for the 

 Dissection of Cats, by Prof. Burt G. Wilder and the writer. 



tSee list of works referred to at the end of this paper. The first figure designates the number 

 on the list; the last, the page; the middle, Roman numeral, the volume. 



