96 ALLEN 
In Hexagrammos and Sebastodes the subclavians are essen- 
tially the same as in Ophzodon, except that no vessel corre- 
sponding to subclavian vein,,, was observed. In Scorpenzch- 
thys there were at least 3 znternal subclavian veins (P|. IV, fig. 
30; Sub.V..,,); all of which broke up in the anterior fork of 
the kidney. The external subclavian vein in Scorpenichthys 
(Pl. IV, fig. 30; Sub.V.,,)) instead of emptying into the sinus 
venosus, breaks up in the anterior fork of the kidney, cephalad 
of the internal subclavians. 
6. Hepatic Portal System. 
This system of veins returns most of the venous blood from 
the stomach, spleen, ceca and intestine. Some of the blood, 
however, from the posterior part of the stomach and intestine, 
reaches the right cardinal through the posterior mesenteric vein. 
This vein anastomoses with the portal system in at least two 
places. In Ofhzodon there are 2 distinct portal veins, which 
terminate in the right and left lobes of the liver. The right 
portal returns the blood from the right side of the stomach, 
spleen, and a portion of the intestine; while the left portal 
drains the ceca, ventral portion of the stomach, and a portion 
of the intestine. In Ophiodon these 2 systems remain quite 
well separated; nevertheless, their branches anastomose in 
several places in the region of the posterior end of the stomach, 
but within the liver none of their branches unite. Each of the 
portals breaks up into capillaries in its respective lobe, which 
reunite in forming the right and left hepatic veins, and these 
vessels unite in a sinus before emptying into the sinus venosus. 
(a) Fight Portal Vein (Pl. I, figs. 1 and 2; R.Por.V.).— 
In Ophiodon the right portal trunk is in itself a very short ves- 
sel, having its source from 2 principal trunks, one of them being 
the right gastric vein, coming from the stomach, and the other 
branch a vein formed by the union of the splenic and intestinal 
vein, The right gastric vein (fig. 1, R.Gas.V.) has its origin 
in the posterior or cardiac portion of the stomach, where it 
anastomoses with branch Z of the posterior mesenteric vein (fig. 
1, P.Mes.V.) and the posterior gastric vein, which is a branch 
of the left portal. The course of the right gastric vein is 
