THREE CASES OF A PANCEEATIC BLADDER OCCURRING 

 IX THE DOMESTIC CAT. 



BY 



W. S. MILLER, M. D. 



From the Anatomical Laboratory of the University of Wisconsin. 



With 3 Text Figures. 



The arrangement of the jjancreatic ducts in the cat is c^uite different 

 from that in man or in the dog. 



In man we find the ductus pancreaticus (Wirsungi) opening into the 

 duodenum in connection with the ductus choledochus, while the ductus 

 accessorius (Santorini) enters the duodenum nearer to the pylorus. 

 The larger of these two ducts is the ductus pancreaticus. 



In the dog the ductus pancreaticus, as in man, enters the duodenum 

 with the ductus choledochus, but the ductus accessorius enters the duode- 

 num caudosinstralward from the common opening of the ductus chole- 

 dochus and ductus pancreaticus. The larger of these two is the ductus 

 accessorius. 



There are in the cat two pancreatic ducts, and their relation to the 

 ductus choledochus and duodenum is practically the same as in the dog, 

 with the exception that the ductus pancreaticus is the larger of the two 

 ducts. 



Following the nomenclature used by Owen, we find that the ductus 

 pancreaticus is formed by the union of the two inain trunks which come, 

 the one from the splenic, the other from the duodorsal portion of the 

 pancreas. The ductus accessorius is small, in some cases insignificant 

 in size, and varies considerably in its mode of origin. 



The ducts of the pancreas in Mammalia differ from those of the liver 

 in that there is not usually connected with them a receptacle for the 

 storage of the pancreatic juice; on the other hand, absence of a gall- 

 bladder, except in the Perissodactyla, is exceptional. 



In 1815 Mayer figured and described a pancreatic bladder in a cat. 

 This bladder was situated on the inferior (caudal) surface of the liver, 

 close to the gall-bladder, and was connected with the duct of Wirsung 



American Journal of Anatomy. — Vol. III. 



20 



