536 Wisconsin Academy of Sciences, Arts, and Letters. 
O’Donoghue ('12) describes this artery in Tropidonotiis natrix 
as supplying the spleen and gall bladder also. In Zamenis con¬ 
strictor this artery was figured and described by the writer 
(’16). It supplies the stomach, gall bladder, spleen, pancreas 
and fat body. 
The superior mesenteric artery leaves the aorta a short dis¬ 
tance posterior to the pancreas and sends a large anterior branch 
to the region of this organ. The branch supplies the stomach, 
duodenum, spleen, pancreas and fat body. It probably supplies 
the gall bladder also, but I could not be certain in any case. The 
posterior branch of the superior mesenteric artery follows the 
intestine and forms a junction with the first inferior mesenteric 
artery. 
The aorta gives off one branch to each of the adrenal bodies. 
These arteries send variable branches to the ovaries or testes, 
the oviducts or sperm ducts, and to the fat bodies. 
Between the adrenal bodies and the kidneys of each side ar¬ 
teries pass from the aorta, down to the oviducts or Tat bodies or 
both. They could not always be found and did not exceed three 
in number in any ease. The most posterior one may be con¬ 
nected with the anterior renal artery which often supplies the 
fat body or oviduct. 
The renal arteries vary from three to six. Any one of them 
may be connected with the oviduct or fat body. 
The Right Jugular Vein. 
The right jugular vein receives blood from the following or¬ 
gans: trachea, esophagus, right thymus gland, thyroid gland, 
fat body, epigastric vein, tongue muscles, and head, (Fig. 2). 
It does not receive any blood from the right dorsal parietes ex¬ 
cept through the azygous veins. The anterior branch of the 
azygous vein extends forward to the head, receiving branches 
from the right dorsal parietes and the esophagus. The branches 
from the esophagus form a reticulation on the esophagus and send 
branches off to the left which enter the right jugular vein; so 
the anterior azygous and right jugular veins are connected by 
this reticulation. The posterior azygous vein differs greatly. It 
may consist of three large trunks from the right parietes in its 
maximum condition or may be reduced to a medium sized trunk 
