i56 



MR, F. E. BEDDARD OX THE 



[Feb. 16, 



which arise at fairly equidistant intervals of about an inch. 

 The two lobes of the liver are served by different arteries, all of 

 which spring from a continual longitudinal hepatic artery which 

 runs between the oesophagus and the liver. The exact arrange- 

 ment of these branches in the case of one artery is shown in the 

 accompanying drawing (text-fig. 71), and the others do not differ 

 greatly. 



Text-fio-. 71. 



7 I fl^( 



P' ^ Rl 



One of the hepatic arteries of Opliio-pliagxis. 



Ao., aovta ; L.L., branches of hepatic artery to left liver-lobe : oes., oesophageal 

 branches; R.L., branches of hepatic arterj' to riglit line. 



The superior mesentei'ic artery arises a little behind the gall- 

 bladder, and divides into the usual two branches — one gastric, the 

 other intestinal. The inferior mesenteric arises just behind the 

 anterior spermatic artery. It crosses the anterior kidney ventrally, 

 and gives off a branch to it on the way. After this artery there are 

 5 intestinal arteries. The next to the inferior mesenteric arises 

 behind the anterior kidney. The four following arteries are 

 somewhat crowded together. In addition to these, some of the 

 renal ai'teries give off branches to the intestine. 



Gastric Arteries. — Six arteries arise from the aorta after the 

 end of the liver and supply the walls of the stomach. Five of 

 these are fairly close togethei- and at the anterior end ; the sixth 

 is much further away, though not qiiite halfway between the 

 fourth gastric artery and the origin of the gastric branch of 

 the sviperior mesenteric, which may be regarded as a seventh 

 gastric artery. These arteries combine to form two longitudinal 

 vessels running along the stomach, which practically commence 

 with the first of these artei'ies, though slender anastomoses exist 

 anteriorly. I call, in fact, that artery the first of the gastric 

 series which begins the longitudinal ai-teries and has at least no 

 marked branch to the liver. It may furthermore be pointed out 

 that the six purely gastric arteries pass ventrally of the portal 

 vein, while the gastric branch of the superior mesenteric lies 

 dorsally to that vein. The first two gastric arteries divide into 



