THE SKATE. 



63 



extreme right of the figure : the left hypobranchial artery is also 

 displaced outwards ; that of the right side (left in the figure) (hy.br) 

 is drawn in situ. 



a.br. I, first, and a.br. 5, last afferent branchial artery : a.co, anterior 

 coronary artery : a.in, anterior innominate artery : b.a, bulbus arterio- 

 sus : br, brachial artery : c, caudal artery : c.a, conus arteriosus : 

 c.c, common carotid artery : cce, cceliac artery : d, duodenal artery : 

 d.ao, dorsal aorta : e.br. i, first, and e.br. 9, last efferent branchial 

 artery : e.c, external carotid artery : f.n, artery to fronto-nasal process : 

 g, gastric artery : h, hepatic artery : hy, hyoidean artery : hy. br, 

 hypobranchial artery : i, intestinal artery : i.c, internal carotid artery : 

 z7, iliac artery : i.m, inferior mesenteric artery : ;?/«, artery to man- 

 dible : n.br, nutrient arteries of the gills : od, oviducal arteries : p.co, 

 posterior coronary artery : p.in, posterior innominate artery : pn, 

 pancreatic arteries : r, renal arteries : s, artery to snout : s.cl, sub- 

 clavian artery: s.m, superior mesenteric artery: spl, splenic artery : 

 spm, spermatic artery : v, ventricle : v.ao, ventral aorta : vr, vertebral 

 artery. 



140. The inferior jugular vein (Figs. 17 and 21, i.ju] situated in 

 the dorsal wall of the pericardium, near its outer border : it brings 

 blood from the floor of the mouth and pericardial walls, and enters the 

 precaval sinus (§ 149, Figs. 17 a:nd 21, pes). 



Y\G. 21. Raja nasuta. Diagram of the heart and chief blood- 

 vessel-, from the left side (half nat. size). 



a.br. I, first, and a.br. 5, last afferent branchial artery : a.co, anterior 

 coronary' artery : au, auricle: br.a, brachial or subclavian artery: 

 br V brachial vein : c.a, conus arteriosus : cd, cardinal vein : d.ao, 

 dorsal aorta : e.br. I, first, and e.br. 9, last efferent branchial artery : 

 h s hepatic sinus : hy, hyoidean artery : hy.br, hypo-branchial artery : 

 ij'u inferior jugular vein :>, jugular vein: n.br, nutrient arteries of 

 the 'gills: f.co, posterior coronary artery: pes, precaval smus : s.v, 

 sinus venosus ; v, ventricle : v.ao, ventral aorta. 



