OBSERVATIONS ON THE ANATOMY OF THE WEDDELL SEAL. 11 



appear to arise from the right hepatic vein independently of the ductus venosus, more 

 especially in view of the fact that the inferior vena cava receives direct tributaries from 

 the caudate lobe adherent to its ventral aspect. 



The gall-bladder, which was empty, occupied a fossa on the visceral aspect of the 

 mesial portion of the right lobe of the liver. It thus lay to the right side of the 

 ligamentum teres, from which it was separated by a projecting portion of liver 

 substance, connected to the left lobe by a pons hepaticae. This portion of the liver 

 corresponded in general position with the quadrate lobe of the human liver. 



The cystic duct passed towards the hilum of the liver and, having been joined by 

 hepatic ducts corresponding in number with the three chief lobes of the liver, the 

 common bile-duct was formed. This duct pursued its course on the ventral aspect of 

 the foramen of Winslow and, immediately after passing this foramen, i.e. just before 

 reaching the duodenum, it was joined by the pancreatic duct. The duct thus resulting 

 came in contact with the duodenum a little more than half an inch from the pylorus. 

 It perforated the duodenal wall very obliquely, and opened on the summit of a papilla at 

 a distance of 2 inches from the pylorus. 



The pancreas presented a characteristic appearance. A small part of this gland 

 was found within the duodenal mesentery, but the greater part of the organ extended 

 headwards behind the lesser peritoneal sac. The pancreatic duct emerged from the 

 substance of the organ on the cephalic (anterior) side of the foramen of Winslow (not 

 from that part within the duodenal mesentery), and, extending to the right side, it 

 formed a junction with the common bile-duct on the cephalic side of the foramen of 

 Winslow and fully 2 inches from the common orifice by which both ducts pour their 

 contents into the duodenum. 



The spleen measured from 9 to 10 inches in length, from 1 to 6 inches in width, 

 being narrow anteriorly and wide posteriorly. It was extremely thin, being not 

 more than a quarter of an inch in thickness. It was situated between the stomach and 

 the dorsal wall, being attached to the former by the gastro-splenic omentum and to the 

 latter by a dorsal mesial mesentery. There was no intimate relation between the spleen 

 and either of the kidneys, because these organs were removed from all immediate 

 association by reason of their situation considerably nearer to the pelvic region. The 

 tail end of the pancreas extended into the posterior splenic mesentery but did not come 

 in contact with the spleen. 



(ROY. soc. EDIX. TRANS., VOL. XLVII., 63.) 



