_a._ =A. gastroduodenalis= (_g_).--This arises from the hepatic near the pylorus and passes caudad, dividing one or two centimeters from its origin into three branches, =A. pylorica= (_h_), =A. pancreaticoduodenalis superior= (_j_), and =A. gastroepiploica dextra= (_i_). The =pylorica= (_h_) (which may arise directly from the hepatic) passes to the pylorus, thence along the lesser curvature of the stomach, dividing into numerous branches and anastomosing with the gastrica sinistra. The =pancreaticoduodenalis superior= (_j_) passes to the duodenum, supplying it and the duodenal part of the pancreas and anastomosing with the pancreaticoduodenalis inferior (_k_). The =gastroepiploica dextra= (_i_) passes along the greater curvature of the stomach from the pyloric end and supplies the walls of the stomach, sending branches also to the ascending limb of the great omentum. These branches anastomose with the terminal branches of the splenic artery. 2. =A. gastrica sinistra= (_e_).--This arises from the cœliac artery and passes to the lesser curvature of the stomach, extending along this to the right. It gives off many branches to the walls of the stomach, and anastomoses with A. pylorica. =A. ventriculi dorsalis= (_l_).--One or two small arteries which arise either from the gastrica sinistra or the cœliac artery, and pass toward the dorsal part of the greater curvature of the stomach near its cardiac end. 3. =A. lienalis= (_f_).--The splenic artery is the largest of the branches of the cœliac axis, of which it appears to be the direct continuation. It divides into two large branches, one to the cranial end, the other to the caudal end, of the spleen (1). From the latter a large branch passes to the pancreas and descending limb of the great omentum. B. =A. mesenterica superior= (Fig. 126, _d_).--The superior mesenteric artery is larger than the cœliac. It supplies the blood to the small intestines and caudal portion of the pancreas and to the ascending and transverse colon. It arises from the ventral side of the abdominal aorta about one centimeter caudad of the cœliac axis and passes caudoventrad, forming a curve with the convexity dextrad. It gives off the =pancreaticoduodenalis inferior=, =colica media=, =colica dextra=, =ileocolica=, and numerous branches to the small intestine. 1. =A. pancreaticoduodenalis inferior= (Fig. 125, _k_).--This passes to the caudal end of the pancreas and a part of the duodenum, anastomosing with the pancreaticoduodenalis superior. 2. =A. colica media= is a large branch to the transverse and descending portions of the large intestine. It divides and sends branches in both directions which anastomose with the colica dextra and with branches from the inferior mesenteric arteries. 3. =A. colica dextra.=--A small branch which passes to the ascending and transverse colon, anastomosing with the colica media and ileocolica. It is sometimes absent.