177 
capsule, and the surrounding areolar tissue. After leaving the trabe- 
cule the arteries rapidly diminish in size by giving off many small 
branches to the medullary and cortical substance. 
The arteries in the hilus stroma which do not enter trabecule 
go immediately into the gland substance running at first more or less 
independent of the lymph cords. The plan of division varies. Some 
arteries run a straight course toward the periphery of the gland turn- 
ing at right angles to run beneath the follicles parallel to the surface 
of the gland. Branches are given off from the straight portion of the 
artery to the medullary substance while from the arched portion branches 
supply both the medullary and cortical substances. The arched portion 
terminates by turning toward the periphery of the gland to supply a 
follicle or it enters a trabecula in which it passes to the periphery 
to anastomose with the arteries of the capsule, and extracapsular are- 
olar tissue. Other arteries on entering the medullary substance im- 
mediately give off two or more branches which in turn give off other 
branches. The direction of these branches is toward the periphery of 
the gland. The arteriz lympho-glandule or larger arteries (Fig. 1 A) of 
the lymphatic gland run independent of the lymph cords, but the smaller 
ones (B) run in the centre of the cords to give rise to the rich capillary 
plexuses of the cords in which they lie. The small artery of a given 
lymph cord may give off branches which pass into neighboring cords 
of the anastomosing medullary substance. These small arteries in 
turn also give rise to rich capillary plexuses lying in the peripheries 
of their cords. 
The capillaries of a plexus in the periphery of a cord (F’) unite 
to form small veins (G) which also lie upon the surface of the lymph 
cord. These small veins anastomose freely to form a rich venous 
plexus by which the blood is emptied into the larger veins. One rarely, 
if ever sees a vein along with the artery in the centre of the cord. 
The blood supply of the cortical substance is derived from the 
small arteries in the centre of the cords which enter the proximal end 
of the follicle, the artery sometimes arches to pass through the inter- 
follicular septum to supply a neighboring follicle. In this case the 
artery at the proximal end of the first follicle is larger than usual, or 
two arteries may enter it. 
Occasionally an artery in a trabecula may supply neighboring 
follicles. Sometimes a follicle is supplied by an artery from the 
capsule. 
The artery (arteria folliculi) (Fig. 1 H) in entering the proximal 
end of the follicle breaks up into straight or slightly a capillaries 
Anat. Anz. XIII, Aufsätze. 
