364 MR. F. E. BEUDAKD OX THE [Fel). 16, 



branch fi'oin the postei'iorly running Vjranch of the first hepatic 

 artery. This descending branch also exists in some of the other 

 interspaces, pai-ticularly in that between the Vlth and Vllth 

 hepato-cesophageal trunks. All the hepato- oesophageal trvinks 

 resemble each other in plan, though differing in detail. They all 

 divide neai- to the liver into a Y-shaped fork, of which one 

 branch runs foi'ward and unites with the postei'ior branch of the 

 Y in front. The point at which division occurs varies, but it is 

 generally near to the liver. It is much farther away from the 

 liver in the second branch only, as has been mentioned. Each of 

 these trunks gives off at most three branches, which supply the 

 oesophagus and the walls of the lung. More generally there ai'e 

 only two of these branches, and in the case of the 6th vessel I 

 could find only one. The point at which they are given off 

 varies. 



Following the eighth vessel, which concludes the series that lie 

 between the oesophagus and the liver, is a ninth branch of the 

 aorta which supplies the same regions. It lies, however, 10 cm, 

 behind the liver and 35 mm. behind the eighth hepato- oesophageal 

 vessel. Between it and the latter are two vertically running- 

 branches of itself and the eighth trunk precisely like that which 

 lies between vessels 6 and 7. This ninth vessel is at once the 

 last which supplies the liver and the first which supplies the 

 fat-body. 



The gastric region of the alimentary tract is supplied by three 

 arteries, of which the third and last is very much the most 

 impoi'tant. All of these arteries give off a branch oi- branches to 

 the fat-body. Both of the first two smaller gastric ai-teries come 



Text-fig. 76. 



Anterior testis and blood-sui)ply of Pijthon spilotcs. 



Ao., aorta; F.B., arteries to fat-body; S):V., suprarenal portal vein; 

 T., testis ; Sjnes., superior mesenteric artor^'. 



into direct relations with the third and largest artery. The latter 

 gives ofi" two branches which run forward along the stomach ; 

 each of these ultimately ends in the main twig of gastric arteries 

 1 and 2. The third gastric artery before it divides into these two 



