BLOOD-VASCULAR SYSTEM OF THE LORICATI IOI 
right portal anastomoses with radical a of the left portal. In 
Scorpenichthys this union sometimes occurs, but with Off7- 
odon it has never been observed. However, both Ophzodon and 
Scorpentchthys have a connecting vein that interlinks these 2 
systems in the region of the spleen. 
(c) Right Portal in Hexagrammos, Scorpenichthys and Se- 
bastodes. —In Hexagrammos, as with Ophiodon, this vessel 
(P1. IV, fig. 27; R.Por.V.) has its origin from an intestinal, and 
a gastric vein. The 7¢ght gastric vem (Pl. IV, fig. 27; R.- 
Gas.V.) is essentially the same as in Ofphzodon, except that 
there is no posterior mesenteric vein for it to anastomose with 
on the apex of the stomach, and it runs on the opposite side of 
the artery from what it does in the other 3 genera. The vessel 
designated as zntestznal vein, (Pl. IV, fig. 27; Int.V..,)) is the 
principal intestinal vein. It arises in the region of the rectum, 
but soon crosses over to follow along the posterior arm of the 
ileum from which it receives several branches before receiving 
the splentzc vein’ (fig. 27; Spl.V.), and another good-sized 
branch which drains the region supplied by intestinal artery... 
Passing cephalad, parallel with, but below the corresponding 
artery it crosses over intestinal vein,., the anterior part of the 
intestine, the coeliac artery, radical @ of the left portal, and 
when the stomach is reached unites with the right gastric vein 
to form the right portal (fig. 27, R.Por.V.), This vessel im- 
mediately passes under intestinal artery,,,, between the cceliac 
and right hepatic arteries, along the posterior surface of the 
gall-bladder, but behind the right hepatic artery. Here it re- 
ceives a few small branches from the bladder and terminates 
in 2 or 3 small branches in the right lobe of the liver, and also 
anastomoses with radical @ of the left portal. 
In Scorpenichthys the right portal (P1. IV, fig. 29; R.Por.V.) 
has its source entirely from the right gastric and the splenic 
veins. All of the intestinal veins empty into the left portal. 
The right gastric vein (fig. 29, R.Gas.V.) is practically the 
same as in Opfzodon; arising in the cardiac end of the stomach, 
1In Hexagrammos the spleen is located much further caudad than is the case 
with any of the other genera studied. Its position is much nearer the vent than 
the stomach. 
