66 
HEMOLYMPH NODES OF THE SHEEP 
II. The Haemolymph Glands of the Sheep. Ibid. 
In this report, among other things it was stated that the earliest dif- 
ferentiation between the Anlagen of lymph and hemal nodes was observed 
in foetuses 9.8 cm. long, and that hundreds of injections from adjacent 
nodes, from the surrounding tissues as well as others made from the aorta 
and vena cava and from large lymph vessels and nodes, proved conclus- 
ively that the hemolymph nodes of the sheep are independent of the 
lymphatic system and are not intercalated in the veins. The following 
were some of the other conclusions stated there: 
1. That the reticulum is not lined by endothelium. 
2. That the circulation is an open one. 
3. That the peripheral sinus and blood sinuses are not in direct con- 
nection with either the venous lacunae of Weidenreich or with the arteries, 
save developmentally. 
4. That the peripheral sinus and blood sinuses are inconstant struct- 
ures, while the venous lacunae are always present, even if not evident, 
on cross-section of a node. 
5. That the arteries communicate with the venous lacunae, and that 
the latter communicate with each other and with the veins. 
6. That the relation of the vein or veins to the node is an exceedingly 
variable one, and is frequently merely a contact relationship. 
7. That small veins occasionally join the haemolymph nodes by 
penetrating the capsule near the periphery, and that these veins are af- 
ferent veins. 
8. That it is easy to distinguish a haemolymph node from a lymph 
node by means of injection, and that it is equally easy to distinguish a 
venous injection from an arterial one. 
9. That pigment is rarely found in haemolymph nodes, but fre- 
quently in lymph nodes. 
10. That "mixed glands," i. e., true haemolymph glands, were not 
found. 
11. That the haemolymph nodes of the sheep, goat, and bovines are 
very similar in structure. 
12. That, in view of these facts, the word haemolymph as applied to 
these nodes in the sheep is a misnomer, and that the term haemal node, 
suggested by Lewis, is to be preferred. 
