216 BULLETIN OF THE UNIVERSITY OF WISCONSIN. 



going to the right side, the other to the left. Both branches sub- 

 divide to supply this organ and in addition to this the left branch 

 gives off one or two branches to the spleen, Sp., PI. 9. 



The Coeliaco-Mesenteric, Coe. M., PI. 9, arises from the 

 dorsal aorta near the center of the abdominal cavity and runs 

 out at right angles to the aorta through the pancreas, where it di- 

 vides into three main branches. The first of these branches runs 

 cephalad through the anterior lobe of the pancreas dividing into 

 two smaller branches, one containing anterior, as the Splenic, 

 Sp'., PL 9, to supply the spleen, the other runs out at nearly a 

 right-angle to the stomach ; this is the Coronary, Cor., PI. 9. 

 The second branch is the Hepatic, Hp., PL 9, which supplies 

 the liver and the gall bladder. The third branch goes to the in- 

 testine. 



The Inferior Mesenteric Arteries, I. M., PL 9, sometimes 

 as many as twenty in number, arise from the aorta at varying 

 intervals and run to the intestine, dividing, and as a .rule, anas- 

 tomosing before they reach it, forming a sort of discontinuous 

 vessel along the attached border of the intestine. From this, 

 short semi-circular arteries arise which pass to the wall of the 

 intestine. 



In the male, nine to eleven Spermatic Arteries, Spr., PL 9. 

 arise on each side from the dorsal aorta and enter the testis. In 

 the female numerous minute arteries go to the fallopian tubes 

 and ovaries. The kidneys receive also a variable number of 

 Renal Arteries, K., PL 9, which arise from the aorta. 



Throughout the entire course of the aorta short vessels arise 

 at regular intervals from its dorsal side, corresponding in num- 

 ber to the vertebrae ; these run dorsad at right angles to the aorta 

 and divide into two branches, one for each side. Each branch 

 runs outwards between the oblique muscles, to which they give 

 off small branches, and at their distal end anastomose with the 

 cutaneous and epigastric. The name Intercostal Arteries, 

 Icls., PL 9, may be given to these vessels. Between the inter- 

 costals, dorsal to the lateral processes of the vertebrae, lie anas- 

 tomosing branches, Anas., PL 9, which are continuous with the 

 vertebral. 



