70 ALLEN, 
tric artery (Pl. IV, fig. 29; P-Gas.A.), which supplies the 
ventral posterior or cardiac portion of the stomach. The main 
intestinal trunk crosses the ceca and after passing under the 
first arm of the ileum sends off ¢ntesténal artery,s (Pl. IV, fig.29 ; 
Int A.,), which supplies the posterior part of the intestine; while 
the main intestinal trunk continues caudad, supplying both arms 
of the ileum. Except from the different points of origin, the 
left hepatic artery (P\. IV, figs. 29 and 30; L.Hep.A.) coming 
from the right gastric artery, and the r7ght hepatic artery (Pl. 
IV, figs. 29 and 30; R.Hep.A.) from the left gastric artery, 
the peripheral distribution of the 2 hepatic arteries is practically 
the same as in Ophiodon. Perhaps it should be mentioned that 
there is but one left hepatic artery in Scorpenzchihys. 
Mesenteric Artery in Hexagrammos (P|. IV, fig. 27; Mes.- 
A.).— As has already been stated, the left gastric artery (Pl. 
IV, fig. 27; L.Gas.A.), which is much shorter than in the other 
3 genera, is given off almost directly opposite the cceliac artery. 
This would make it appear as though the cceliaco-mesenteric 
trunk separated into 3 branches, namely, the cceliac, mesenteric 
and left gastric arteries. ‘The mesenteric artery runs along the 
stomach for a short distance and divides into the characteristic 
right gastric and intestinal arteries. As in Ophiodon the right 
gastric artery (Pl. IV, fig. 27; R.Gas.A.) follows along the 
right and upper side of the stomach, but it has, however, ex- 
changed positions with the right gastric vein. In this respect 
it also differs from Scorpenichthys and Sebastodes. Close to 
its source it gives off the left Aepatc artery (Pl. IV, figs. 27 
and 28; L.Hep.A.), which comes into very close contact with 
the cceliac artery and breaks up into 3 branches, which pene- 
trate the liver with terminal branches @, 0, and ¢ of the left 
portal vein. The branch following terminal branch @ anasto- 
moses with the right hepatic artery in a similar manner to the 
anastomosing of this branch of the left portal with the right 
portal vein. As in Scorpenichthys there is but one left hepatic 
artery. The Zntestinal artery, (Pl. IV, fig. 27; Int.A.,,) soon 
after leaving the mesenteric artery sends off the r7ght hepatic 
artery (Pl. IV, fig. 27; R.Hep.A.), which at first runs along the 
surface of the gall-bladder as the gall-bladder artery, and pene- 
