456 The Pancreatic Ducts in the Dog 



anlage, and may be termed basal (portio basalis); the part that diverges 

 from the duodenum may be designated duodorsal (portio duodorsalis) 

 (making a restricted application of Owen's term). 



The left limb of the pancreas, from its position, may be termed 

 omental (portio omentalis). 



2. The names " ductus pancreaticus " and " ductus pancreaticus acces- 

 sorius " do not always coincide with "ductus Wirsungianus " and 

 " ductus Santorini." The latter are applied with reference to relation 

 with the ductus choledoehus, which is constant. The former are applied 

 with reference to relative size of the pancreatic ducts, which varies. 

 For the purposes of human anatomy, of comparative anatomy, and of 

 embryology, it is desirable to have exact names. The modification 

 which the ducts and parts of the pancreas undergo seems to necessitate 

 the retention of two pairs of terms, one pair based on organogeny, the 

 other on the morphology of the adult gland. Instead of the indefinite 

 and unscientific eponymic terms " Wirsungianus " and " Santorini " 

 there may be used: 



(1). Ductus liepatopancreatis seu ventropancreatis — the duct arising 

 only from the ventral or hepatopancreatic anlage. 



(2). Ductus dorsopancreatis — the duct derived only from the dorsal 

 pancreatic anlage. 



The ductus pancreaticus is the main duct (in the adult gland) whether 

 simple or compound in origin. The ductus pancreaticus accessorius is 

 the smaller or subsidiary duct, or residue of a duct, when two are present 

 in the adult gland. 



In conclusion, it is a pleasure to thank Professor L. F. Barker and 

 Professor J. M. Flint for many kind suggestions throughout the course 

 of this work. 



ABBEEVIATIONS USED IN THE FIGURES. 



a. p. d. s., arteria pancreatico-duodenalis superior. 



V. p. d. s., vena pancreatico-duodenalis superior. 



ft. om., bursa omentalis. 



duo., duodenum. 



d. c, ductus choledochus. 



d. S., ductus Santorini. 



d. W., ductus Wirsungianus. 



f. s. p., facies pancreatis sinistra. 



m. d. p., margo pancreatis dorsalis 



md., mesoduodenum. 



0. ma., omentum majus. 



0. mi., omentum minus. 



