104 



BULLETIN OF THE BUREAU OF FISHERIES. 



the ventral surface and to break up into the rete mirabile. As already stated, it has 



two main branches, which are given off near its 

 origin. The first is a gastric branch (69) and 

 Supplies a part of the left side of the stomach; 

 the second is the right hepatic artery (70) which 

 supplies the gall bladder and right side of the 

 liver. 



The fourth branch of the cceliacomesenteric 

 artery is the pancreatic artery (71). This is a 

 small vessel which is given off about 1 cm. 

 caudal to the third branch and almost imme- 

 diately enters the pancreas. 



Beyond its fourth branch the cceliacome- 

 senteric artery continues caudad, passing to the 

 right of the stomach to divide, at a point just 

 cranial to the spleen, into four branches (78, 

 //. 75, 76). The first branch, or gastrosplenic 

 artery (78), runs ventrad along the cranial border 

 of the spleen, which it supplies by a branch (73) 

 immediately entering that organ. After a short 

 distance the main trunk of the artery (72) divides 

 into several branches, which supply the Ciecal 

 portion of the stomach and the distal loop of 

 the intestine. The remaining three branches 

 (,'/. 75, 76) are mesenteric arteries; two of them 

 (7/. 75) supply the proximal portion of the 

 intestine; the remaining one (76), which is the 

 largest, runs caudad in the mesentary, and 

 supplies the distal portion of the intestine and 

 rectum. 



Numerous variations occur in connection 

 with tin 1 branching of the mesenteric vessels; 

 for example, branches 7/ and 75 often send 

 twigs to the distal, as well as to the greater 

 part of the proximal loop of the intestine. 



The subclavian arteries (fig. It), pi. i). The 

 subclavian arteries (77) arise in common from 

 the ventral surface of the dorsal aorta just 

 caudal to the origin of the cceliacomesenteric 

 artery. They inn laterad, caudad. and some- 

 what ventrad to the base of the pectoral fin, 

 where they terminate in two branches, the 



fig. is.— Diagrammatic cross section of tody oi brachial artery and the ramus epigastricus de- 



;^::; , : 1 :;;::rn:,,;;:;;:r ani ' ,,K, ' nu ' pendens of Muiier as*..,. They' give off a 



number of branches: 

 (a) About 1 cm. from the dorsal aorta, a branch (78), which runs dorsad and 



