260 E. A. BAUMGARTNER 



duct arises with the common bile-duct from a fold in the lower 

 left wall of the duodenum (fig. 7, C). It shortly separates from 

 the common bile-duct and extends anteriorly along its right side. 

 It is somewhat ventral to the hepatic duct and divides into dor- 

 sal and ventral ducts. The ventral duct shortly sends off branches 

 caudalward to the left ventral portion and extends forward in 

 the ventral anterior part (fig. 34). The dorsal of the two ducts 

 divides several times into dorsal and ventral rami. Branches 

 from the dorsal duct extend caudalward and to the right into the 

 anteriorly directed portion of the dorsal pancreas. The dorsal 

 pancreatic duct is given off from the upper left side of the duo- 

 denum near the caudal end of the pancreas and extends almost 

 directly upward sending off several short branches anteriorly 

 and posteriorly. 



3. Description of the adult pancreas 



In a 15 cm. Amblystoma the anterior end of the pancreas, 

 which is somewhat triangular in section, is embedded in the 

 liver to the right of the stomach. It lies along the upper con- 

 cave border of the liver with the portal vein and has a small 

 free surface lined with peritoneum. Caudal to this the pan- 

 creas lies to the left of the duodenum, between it and the stomach 

 and enlarges in a dorso-ventral direction (fig. 35). Now it 

 passes along the left wall of the duodenum but extends both dor- 

 sally and ventrally to it, the ventral portion being between the 

 duodenum and stomach. About 5 mm. by sections from its 

 anterior end, the pancreas divides into two masses, one along the 

 left ventral surface of the duodenum and the other dorsal to 

 it. The ventral mass remains in about the same position, and 

 extends caudalward almost half the length of the body of the 

 glajid. At the caudal end of the ventral portion of the pancreas 

 the dorsal mass which has shifted somewhat to the right and 

 lies above other loops of the intestine as well as the duodenum, 

 is divided into two or three irregularly-shaped lobes, one of which 

 is dorsal to the duodenum and directly to the right of the stomach. 

 This part of the pancreas extends a considerable distance cau- 



