560 DR. C. F. SONNIAG ON THE COMPARATIVE ANATOMY 



twig fi-om the arterial ring round the pyloro-duodenal junction 

 (text-fig. 60, B, a'). There is nothing new to recoixl about its 

 attachments. 



The lesser omentnm has a T-shaped attachment to liver and 

 stomach (text-fig. 60, A, a). The horizontal limb lies along the 

 lesser curvature, and the vertical limb runs back along the 

 ventral surface of the stomach. 



The great omentum of IVichosurus vidpectda is well laden 

 with fat. 



The Stomach. 

 PhasGolarctos cinereus. 



The observations recorded here are supplementary to the 

 descriptions by Martin (8), Young (13), Forbes (4), Edelmann (2), 

 Flower (3), and Home (5). 



The long axis of the sac-like stomach, which lies in the 

 epigastrium and left hypochondriam. runs posteriorly, ventrally, 

 and to the right, and the wellmai^ked fundus is directed forwards 

 and to the left. Projecting from the greater curvature imme- 

 diately below the pyloric cylinder is a sac whose walls are thinner 

 than those of any other part of the stomach. 



Relations : — 



Anteriorly — liver and right suprarenal capsule. 



Posteriorly — spleen, intestines, solar plexus, left kidney, and 

 suprarenal capsule. 



Right — dviodenum, gall-bladder. 



Left and i^entral — abdominal pai'ietes. 



Dorsal — crura of the diaphragm, aorta, pancreas, right kidney, 

 inferior vena cava. 



Measurements : — 



Total length 7 cm. 



Length of fundus 2-2 ., 



Width between curvatures 3"7 ,, 



Lesser curvature 2*2 ,, 



Length of pjdoric tube 1-6 ,, 



Arteries (text-fig. 60). — The stomach receives its blood supply 

 from the three branches — gastric (a), hepatic (b), and splenic (c) 

 — of the coeliac division of the cceliaco-mesenteric artery (see 

 page 570), and each vessel is accompanied by fine nerves derived 

 from the vagus and solar plexus (text-fig. 60, A). 



The gastric artery divides into a large ventral branch (d) and 

 two dorsal branches (e) — large and small. The former, after a 

 straight course towards the stomach, breaks up into many 

 tortuous vessels ramifying over the fundus, and some can bo 

 traced into the left side of the gland-patch. The latter make a 

 similar vascular arrangement on the dorsal aspect of the fundus, 

 and supply the patch as well. 



